GY6 50, Performance, 4-Stroke (139QMB 1P39QMB)

GY6 50cc 4-Stroke (139QMB)  Performance Parts

 This horizontal single cylinder, four stroke, forced air cooled engine has a CTV automatic transmission and is used on many scooters, ATVs, buggies, go karts and mopeds. This engine has a displacement of 49.6cc, a bore size of 39mm and a stroke of 41.5mm . We have parts for the GY6 139QMB, QMB139, 1P39QMB, 50QTB 50cc 4T including performance parts to increase size, power and performance of these engines.

This common engine is found in these imported brands and models: Avanti, Baja Powersports, Baja Primo, Baja SC50, Baja Sun City, Baotian 50QT-11, Baotian 50QT-9, Baotian BT49QT-2, Baotian BT49QT-7, Baotian BT50QT-11, Baotian BT50QT-9, Diamo, Dotera 50QT-11, EVO 50cc, Fly, Fusion, Geely, Jalon JL50QT-15, Jalon JL50QT-16, Jalon JL50QT-18, Jalon JL50QT-21, Jalon JL50QT-21 Falcon, Jonway, Kymco, Maui, Meitian (Mei-Tian), Pantera Freedom, Peirspeed Bolero (50cc), Q Link, Roketa, Roketa Bahama, Schwinn, Shanghai Shenke, Sicily, Sinski XSJ50QT-6, Sinski XSJ50QT-B, Strada, Sunl SL50QT-16, Sunl SL50QT-18, Sunl SL50QT-2, Sunl SL50QT-3, Taishan Commuter, Taishan Sport, Tank, Verucci, Verucci VC50TS-3M, Zhong Hu 50cc, Znen, Zongshen, Zongshen Metro 50cc and many more...

We also carry parts for the following imports from China, Japan, Korea and Taiwan: Baotian Ecobike, Benzhou City Star 50, Benzhou YY50QT, Jiangsu Xinling, Jinlun JL50QT, Karcher KM 50, Kreidler Flory 50, Kymco Agility, Kymco Agility 50, Kymco Agility MMC 50, Kymco Filly 50, Kymco New Dink 50, Kymco Nexxon 50, Kymco People 50, Kymco Super 8 50, Kymco Vitality 50, Kymco Yager, Kymco Yager GT, MSK Ecobike 50, PEUGEOT V-Click, Qingqi QM50QT-6A, REX Capriolo 50, REX Off Limit, REX RS 450, REX RS 500, Rieju Paseo 50, Rieju Toreo 50, Sachs 49er, Sachs Bee, Sanili TS50QT-4, Sanili TS50QT-4, Sprint 50cc, ZhongYu 50 QT-5, ZhongYu 50QT-7, ZhongYu ZY50QT, Zongshen Metro 50, Zongshen ZS50QT-4 and many others....

 (Click on the parts for additional pictures)

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669-18-30 Drive Belt, Bando Performance, GY6 139QMB 50cc, (Short-Case), Baja, JMstar, Jonway, NST, Roketa, Sunl, Tank, TNG, Vento, VIP 101-1001-1003
$38.95 $29.95 Add to Cart

This is a very durable, High Quality Bando 669-18-30 drive belt for the GY6, 4 Stroke, 139QMB, 50cc short case engine (8 bolts on the belt cover). This belt has Aramid cord (Kevlar like material) for strong, heat resistant, long lasting wear and reliability. They don't get any tougher or last longer!

723-17.7-30 (729) Drive Belt, (Honda 23100-GW3-003), Bando Performance, GY6 50, 139QMB, (Long Case), Baja, JMstar, Jonway, NST, Roketa, Sunl, Tank, TNG, Vento, VIP 101-1001-1027
$51.94 $34.95 Add to Cart

This belt is a very High Quality Bando Performance Belt for the GY6-50 139QMB engine  This belt fits the same applications as the 729-17.7-30 belt, but is very tough and won't wear out easily.  This belt is made of Kevlar type material.  Our best and toughest belt! This belt fits Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50,  Vento, VIP and many others. Note: Scooters with a long case usually have a 12" - 16" rear wheel.

729-17.5-30 Drive Belt, Gates Powerlink, GY6 50, (Long-Case),  Baja, JMstar, Jonway, NST, Roketa, Sunl, Tank, TNG, Vento, VIP 100-1001-1007
$29.95 $24.95 Add to Cart
5 out of 5 Stars!

This is a High Quality Gates Powerlink Belt for the GY6 50cc 139QMB long case engine. This belt fits Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP and many others. Note: Scooters with a long case usually have a 12" - 16" rear wheel. Save time and money, go for quality every time.

Air Filter, (38mm), Black, 30 degree, High Performance, High Flow, Dual Layer, GY6-50, 139QMB and other models 101-1015-2001
$19.95 $12.95 Add to Cart

This is a very high quality Dual Layer 38mm, 30 degree, small profile Performance Air Filter for high air flow that clamps on to your carburetor to ensure a tight clearance fit. This has a quality urethane flange and clamp. This filter Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50,  Vento, VIP and many others.  This will fit just about any scooter, quad, moped, buggy, ATV, dirt bike, etc.

Air Filter, (38mm), Red, 30 degree, High Performance, High Flow, Dual Layer, GY6-50, 139QMB and other models  101-1015-2002
$19.95 $12.95 Add to Cart

This is a very high quality Dual Layer 38mm, small profile Performance Air Filter for high air flow that clamps on to your carburetor to ensure a tight clearance fit. This has a quality urethane flange and clamp. This filter Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50,  Vento, VIP and many others.  This will fit just about any scooter, quad, moped, buggy, ATV, dirt bike, etc.

Air Filter, (38mm), Straight, High Performance, High Flow, Dual Layer, GY6 50cc, 139QMB, PZ-22 101-1015-2003
$19.95 $12.95 Add to Cart

This is a very high quality Dual Layer 38mm, small profile Performance Air Filter for high air flow that clamps on to your carburetor to ensure a tight clearance fit. This has a quality urethane flange and clamp. This filter Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50,  Vento, VIP and many others.  This will fit just about any scooter, quad, moped, buggy, ATV, dirt bike, etc.

Air Filter, 35mm, 4-Stroke HP Air Filter, 30 degree, Chrome Cone, 4 Stroke 49cc - 110cc Honda Style Horizontal Engine 400-1015-4022
$19.95 $12.95 Add to Cart

Air Filter, 35mm, 4-Stroke HP Air Filter, 30 degree, Chrome Cone (approx 90mm long) for the 50cc to 110cc Honda style Horizontal motors, 35mm diameter intake.

Air Filter, 35mm, 4-Stroke HP Air Filter, 90 degree, Shielded Chrome Cone, 4 Stroke 49cc - 110cc Honda Style Horizontal Engine 400-1015-4013
$24.95 $17.95 Add to Cart

This is a very high quality Air Filter, 35mm, 4-Stroke HP Air Filter, 90 degree, Shielded Chrome Cone (approx 70mm long) for many engines including the PZ-18-19 carburetor.

Air Filter, 35mm, 4-Stroke HP Air Filter, Straight, Shielded Chrome Cone, 4 Stroke 49cc - 110cc Honda Style Horizontal Engine 400-1015-4010
$24.95 $17.95 Add to Cart

This is a very high quality Air Filter, 35mm, 4-Stroke HP Air Filter, Straight, Shielded Chrome Cone (approx 70mm long) for many engines including the PZ-18-19 carburetor.

Air Filter, 38mm, 4-Stroke HP Air Filter, 30 degree, Chrome Cone, 4 Stroke 49cc - 125cc Honda Style Horizontal, GY6-50 139QMB Engine 400-1015-4023
$19.95 $12.95 Add to Cart

This is a very high quality Air Filter, 38mm, 4-Stroke HP Air Filter, 30 degree, Chrome Cone (approx 90mm long) for the 139QMB GY6-50 and PZ-22 carburetor.

Air Filter, 38mm, 4-Stroke HP Air Filter, Straight, Chrome Cone, 4 Stroke 49cc - 125cc Honda Style Horizontal, GY6-50 139QMB Engine 400-1015-4017
$19.95 $11.95 Add to Cart

This is a very high quality Air Filter, 38mm, 4-Stroke HP Air Filter, Straight, Chrome Cone (approx 80mm long) for the 139QMB GY6-50 and PZ-22 carburetor.

Air Filter, 38mm, 4-Stroke HP Air Filter, Straight, Shielded Chrome Cone, 4 Stroke PZ-22, 49cc - 125cc Honda Style Horizontal, GY6-50 139QMB Engine 400-1015-4011
$24.95 $17.95 Add to Cart

This is a very high quality Air Filter, 38mm, 4-Stroke HP Air Filter, Straight, Shielded Chrome Cone (approx 70mm long) for the 139QMB GY6-50 and PZ-22 carburetor.

Belt Cover Gasket, Left Crankcase, Long, GY6-50 139QMB, (10 - Bolt Cover) 100-1001-2112
$6.95 $3.95 Add to Cart

Belt Cover Gasket for the 10 bolt cover on the GY6-50 Left CVT Cover Gasket, 139QMB.

Belt Cover Gasket, Left Crankcase, Long, GY6-50 139QMB, (9 - Bolt Cover) 100-1001-2111
$6.95 $3.95 Add to Cart

Belt Cover Gasket for the 9 bolt cover on the GY6-50 Left CVT Cover Gasket, 139QMB.

Big Bore Cylinder Head, Non-EGR, (51mm), 139QMB GY6 50 -110cc,  Fully Assembled, for GY6-50 110cc Big Bore Kit 101-1010-0017
$149.95 $89.95 Add to Cart

This is a high quality Performance Cylinder Head, fully assembled, non-EGR, (51mm), for the GY6 50 to 110cc,  matched for the GY6 110cc Big Bore Kit, Good quality casting, machined to fit the larger combustion chambers.

Big Bore Cylinder Kit, (100cc Kit), GY6 50 to 100cc, 139QMB,  (50mm/13mm Wrist pin), 4T, 50cc upgrade to 100cc 101-1010-2007
$116.94 $89.95 Add to Cart

This is the 100cc Big Bore Kit (100cc kit) for the GY6-50, 4T, 139QMB, QMB139 engine (commonly referred to as the 50mm Big Bore, 100cc kit). This high performance kit comes complete with circlips, 50mm cylinder, gaskets, piston, rings and 13mm wrist pin. You will need to upgrade to the Big Bore Cylinder Head to the 50mm Big Bore Head (part # 101-1010-0013). Refer to your engine number below your belt cover or on your case to be sure you have the right engine.

Big Bore Cylinder Kit, (110cc Kit) (51mm/13mm wrist pin), 4-stroke, GY6 50 to 110cc, 139QMB 101-1010-2012
$169.95 $124.95 Add to Cart

This is a 110cc Tiawanese made high Performance Big Bore Kit, (52mm/13mm wrist pin), GY6-50 conversion to GY6-110, This is the powerful kit!   This ready to go kit mounts on the GY6-50 139QMB base without modification.  This kit comes complete with the 51mm cylinder, piston, rings, wrist pin, circlips, and head and base gaskets.  (known as the 110cc kit).  Be sure to order the matching 51mm Performance Cylinder Head for this upgrade. (part number 101-1010-0017)

Big Bore Cylinder Kit, (125cc),  139QMB (52mm/13mm wrist pin), GY6 50 Conversion to 125cc 101-1010-2013
$189.95 $149.95 Add to Cart

This is a Racing Performance Big Bore Cylinder Kit, (52mm/13mm wrist pin), GY6-50 conversion to GY6-125, This is the ultimate kit!  Mounts on the GY6-50 139QMB base without modifications.  This kit comes complete with the 52mm cylinder, piston, rings, wrist pin, circlips, and head and base gaskets.  (known as the 125cc kit)

Big Bore Cylinder Kit, (80cc Kit), 139QMB, (47mm/13mm Wrist pin), GY6 50 to 80cc, Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50,  Vento, VIP 101-1010-2003
$90.94 $69.95 Add to Cart

This is a 80cc Big Bore Kit for the GY6-50, making it a GY6-80. This kit fits the 4T, 139QMB, QMB139 engine base. This performance kit has everything you need including the 47mm cylinder, piston, rings, 13mm wrist pin, circlips, head and base gaskets. This kit will fit your stock cylinder head or you can use our 47mm Big Bore Head for better performance. (Be sure your engine is the 139QMB often found on the bottom of the engine or near the rear tire on the belt cover area.)

Brake Hose Line, 46.5" Hydraulic Performance Racing Chinese GY6 Scooter Moped 1200-100-1002-5000
$32.45 $24.95 Add to Cart

This is a quality steel braided Front Brake Line Hose for the GY6 and Handsome Boy scooters.  This brake line measures 48 1/2" end to end.

Camshaft,  A9 Sport Performance, GY6-50, 139QMB, (Mid-Range and Top-End Speed) 101-1004-1001
$51.94 $39.95 Add to Cart
5 out of 5 Stars!

This is a A9 Sport Performance Camshaft Assembly for the 4-stroke GY6-50/80/100, 139QMB.  This cam is used primarily for increased power and speed in scooters and can make a huge difference.  This can be installed in engines found in scooters, quads, ATVs, go-karts and buggies. Use this high quality cam in combination with our Big Bore Kit to increase engine performance and boost your upper mid-range and top-end speed potential.  This cam fits the Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50, Vento, VIP and many others..

Carburetor Main Jet,  #85, 4 stroke, GY6 50, 139QMB B-100-1005-3002
$5.14 $3.95 Add to Cart

This is a Carburetor Main Jet (M4 x .7, length 7.2mm) for the GY6 50cc, 4-Stroke engine. These come in various sizes depending on your application. #75 is standard replacement with stock air box. , #85, and the #88 require a Performance Air Filter system and the #95 requires the Performance Air Filter and Performance Exhaust System to get top performance. Installing a Performance Air Filter and Performance Exhaust System will give you the edge you're looking for.

Mechanics Note: If you increase the size of your stock carb jet you will want to improve your air flow both in and out of the engine. For smaller upgrades replace the stock air filter with a Performance Air Filter for this engine. If you upgrade beyond small adjustments you will want to install a Performance Exhaust System to handle the increased combustion and minimize back flow issues.

Altitude can play an issue in scooter performance. When you are dealing with elevation you will want to rejet to prevent your engine from siezing and requiring a rebuild. You will loose about 3% in power for every 1000' in elevation. At 4000' feet you will have lost about 12% of your power output. You will want to go down one (1) jet size for every 1750' to 2000' you go up in elevation. When the air is colder it requires bigger jets because cold air is more dense. If it is 50 degrees colder you would increase your jet size at least one step up. If you don't, your engine may sieze on you.

Carburetor Main Jet,  #88, 4 Stroke GY6 50, 139QMB B-100-1005-3008
$5.14 $3.95 Add to Cart

This is a Carburetor Main Jet  (M4 x .7, length 7.2mm) for the GY6 50cc, 4-Stroke engine. These come in various sizes depending on your application. #75 is standard replacement with stock air box. , #85, and the #88 require a Performance Air Filter system and the #95 requires the Performance Air Filter and Performance Exhaust System to get top performance. Installing a Performance Air Filter and Performance Exhaust System will give you the edge you're looking for.

Mechanics Note: If you increase the size of your stock carb jet you will want to improve your air flow both in and out of the engine. For smaller upgrades replace the stock air filter with a Performance Air Filter for this engine. If you upgrade beyond small adjustments you will want to install a Performance Exhaust System to handle the increased combustion and minimize back flow issues.

Altitude can play an issue in scooter performance. When you are dealing with elevation you will want to rejet to prevent your engine from siezing and requiring a rebuild. You will loose about 3% in power for every 1000' in elevation. At 4000' feet you will have lost about 12% of your power output. You will want to go down one (1) jet size for every 1750' to 2000' you go up in elevation. When the air is colder it requires bigger jets because cold air is more dense. If it is 50 degrees colder you would increase your jet size at least one step up. If you don't, your engine may sieze on you

Carburetor Main Jet, #75, 4 Stroke, GY6 50, 139QMB B-100-1005-3001
$5.14 $3.95 Add to Cart

This is a Carburetor Main Jet  (M4 x .7, length 7.2mm)  for the GY6 50cc, 4-Stroke engine. These come in various sizes depending on your application. #75 is standard replacement with stock air box. , #85, and the #88 require a Performance Air Filter system and the #95 requires the Performance Air Filter and Performance Exhaust System to get top performance. Installing a Performance Air Filter and Performance Exhaust System will give you the edge you're looking for.

Mechanics Note: If you increase the size of your stock carb jet you will want to improve your air flow both in and out of the engine. For smaller upgrades replace the stock air filter with a Performance Air Filter for this engine. If you upgrade beyond small adjustments you will want to install a Performance Exhaust System to handle the increased combustion and minimize back flow issues.

Altitude can play an issue in scooter performance. When you are dealing with elevation you will want to rejet to prevent your engine from siezing and requiring a rebuild. You will loose about 3% in power for every 1000' in elevation. At 4000' feet you will have lost about 12% of your power output. You will want to go down one (1) jet size for every 1750' to 2000' you go up in elevation. When the air is colder it requires bigger jets because cold air is more dense. If it is 50 degrees colder you would increase your jet size at least one step up. If you don't, your engine may sieze on you

Carburetor Main Jet, #80, 4 Stroke, GY6 50, 139QMB B-100-1005-3026
$5.14 $3.95 Add to Cart

This is a Carburetor Main Jet  (M4 x .7, length 7.2mm) for the GY6 50cc, 4-Stroke engine. These come in various sizes depending on your application. #75 is standard replacement with stock air box. , #85, and the #88 require a Performance Air Filter system and the #95 requires the Performance Air Filter and Performance Exhaust System to get top performance. Installing a Performance Air Filter and Performance Exhaust System will give you the edge you're looking for.

Carburetor Main Jet, #95, 4 Stroke, GY6 50, 139QMB B-100-1005-3003
$5.14 $3.95 Add to Cart

This is a Carburetor Main Jet  (M4 x .7, length 7.2mm) for the GY6 50cc, 4-Stroke engine. These come in various sizes depending on your application. #75 is standard replacement with stock air box. , #85, and the #88 require a Performance Air Filter system and the #95 requires the Performance Air Filter and Performance Exhaust System to get top performance. Installing a Performance Air Filter and Performance Exhaust System will give you the edge you're looking for.

Mechanics Note: If you increase the size of your stock carb jet you will want to improve your air flow both in and out of the engine. For smaller upgrades replace the stock air filter with a Performance Air Filter for this engine. If you upgrade beyond small adjustments you will want to install a Performance Exhaust System to handle the increased combustion and minimize back flow issues.

Altitude can play an issue in scooter performance. When you are dealing with elevation you will want to rejet to prevent your engine from siezing and requiring a rebuild. You will loose about 3% in power for every 1000' in elevation. At 4000' feet you will have lost about 12% of your power output. You will want to go down one (1) jet size for every 1750' to 2000' you go up in elevation. When the air is colder it requires bigger jets because cold air is more dense. If it is 50 degrees colder you would increase your jet size at least one step up. If you don't, your engine may sieze on you

Carburetor, (21mm) CVK Performance w/ Accelerator Pump, GY6, Standard & Big Bore 50/80cc, Baja, JMStar, Jonway, NST, Roketa, Sunl, Tank, TNG, Vento, VIP 101-1005-1003
$124.95 $89.95 Add to Cart

This is a high quality (21mm) CVK carburetor w/accelerator pump and electric choke for the GY6 50cc 139QMB and Big Bore 80cc engine found on many scooters, quads, ATVs and mopeds. This carburetor is fitted with a #85 main jet. This CVK will give you better top end power and speed over your stock carburetor.  If you were to combine this carburetor with one of our Big Bore kits and performance cams, it will put a smile on your face. This fits the GY6-50cc or Big Bore 80cc on Baja, JMStar, Jonway, Lance, NST, Roketa, Sunl, Tank, TNG, Vento, VIP and many others.  

  • Intake (outer): 27mm
  • Intake (Inner): 21mm
  • Air Filter Mounting: 39mm
  • Choke: Electric (2-pin male)
  • Accelerator Pump
Carburetor, (22mm) CVK w/ Accelerator Pump, Performance, 4 Stroke, GY6 50/80/100cc, 139QMB, Baja, JMStar, Jonway, Lance, NST, Roketa, Sunl, Tank, TNG, Vento, VIP 101-1005-1002
$114.95 $99.95 Add to Cart

This is a top-shelf high quality 22mm CVK carburetor for the GY6 50cc 139QMB engine that has been upgraded with the 80cc or 100cc Big Bore Kits. This CVK carb has a performance flat slide throttle, CVK pumper, reliable electric choke, large float bowl and Keihin components. This carburetor combined with one of our Big Bore kits and performance cams will put a smile on your face. This 22mm venturi is 4mm larger than stock resulting in more speed and acceleration. This performance carb has excellent air flow and a more consistent fuel/air ratio.

  • Intake (outer): 29mm
  • Intake (Inner): 22.5mm
  • Main Jet: #88
  • Pilot jet: #32
  • Air Filter Mounting: 40mm
  • Choke: Electric (2-pin male)
  • Accelerator Pump
CDI Igniition, DC, High Performance Unlimited, KYMCO Agility 50, 125, KYMCO People 150 101-1006-0032
$89.95 $49.95 Add to Cart

This is a High perfomance Non-Rev unlimited CDI for the KYMCO Agility 50cc and 125cc (2006-2011.  This CDI replaces KYMCO Part Number 30410-LBD6-E00.  This CDI is will also work on the KYMCO People 150 (2002-2011) , and KYMCO People 50 4 stroke (2006-2009) and KYMCO Sento 50 4 stroke (2009-2011.

CDI, AC, 6 pin, Chinese Scooter Moped ATV Racing No Rev Performance GY6 4T 50cc 125cc 150cc 201-1006-0017
$25.94 $19.95 Add to Cart
5 out of 5 Stars!
  • This is a 6-pin AC Racing Performance CDI with an Unrestricted Rev Limit and an advanced timing curve for the GY6 50cc 125cc and 150cc engines. Engine applications include the 139QMB, 152QMI, 152QMJ, 157QMI, and 157QMJ.  These CDI's have no governor and eliminate that irritating rev-limiter which might be keeping your engine speed restricted
  • This CDI is found on the Baja, JMstar, Jonway, Lance, NST,Peace,Roketa, Sunl, Tank, TNG, Vento, VIP and many others. Compatibility, however, is based on matching wiring and connectors. Please ensure your make and model have the same connector and number of pins prior to ordering. This CDI has the rounded dual slot, 6-pin receiver and measures 2.5" x 1.5" x 1.5".
  • This high quality CDI is made tough and is durable on and off the track and will give your engine better acceleration and top end if your engine is in good running condition, including good compression. It is an inexpensive way to gain performance. Check our eBay store we have many different OEM and Racing Performance CDI's to choose from. We recommend taking a look at our high performance coils as well.
  • Mechanics Note: According to our expert customers and the experts on the Scootdawg Proboards there is only one true way to know if you have an AC or DC system. Be sure your battery is fully charged and your fuse is good. Turn the key on, but DO NOT start your engine. In this pin configuration

         [ 1 2 ][ 5 ]
         [ 3 4 ][ 6 ]

If the #6 pin has 12v present, it is a DC fired system. If not then it is AC. Your AC system can have over 50v AC while cranking. 

CDI, AC, 6-Pin, High Performance Racing, GY6 50cc, 125cc, 150cc 101-1006-0021
$32.95 $24.95 Add to Cart

This is an AC High Performance Racing CDI for the GY6 50cc, 125cc, and 150cc 139QMB, 152QMI and 157QMJ based engines. This CDI is similar to our orange performance CDI but has a more aggressive ignition advance curve. This is a performance CDI for the Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP and many others.. We have the best quality ignition parts for Chinese engines!

Mechanics Note:  According to our expert customers and the experts on the Scootdawg Proboards there is only one true way to know if you have an AC or DC system. Be sure your battery is fully charged and your fuse is good. Turn the key on, but DO NOT start your engine. In this pin configuration

[ 1 2 ][ 5 ]
[ 3 4 ][ 6 ]

if the #6 pin has 12v present, it is a DC fired system. If not then it is AC. Your AC system can have over 50v AC while cranking.

CDI, DC, 6-Pin, Chinese Scooter Moped ATV Racing No Rev Performance 4 stroke, GY6  50cc 125cc 150cc 201-1006-0012
$38.94 $29.95 Add to Cart
5 out of 5 Stars!
  • This is a 6-pin DC Racing Performance CDI with an Unrestricted Rev Limit and an advanced timing curve for the GY6 50cc 125cc and 150cc engines. Engine applications include the 139QMB, 139QMA  152QMI, 152QMJ, 157QMI, and 157QMJ.  These CDI's have no governor and eliminate that irritating rev-limiter which might be keeping your engine speed restricted. 
  • For this CDI your engine must have a 3-phase type generator and regulator/rectifier. This CDI has the rounded-style plug receiver. CDI Size: 3" x 1 5/8" x 15/16". 
  • This CDI is found on the Baja SC50 Sun City, Carter Brothers Interceptor GTR 250 with the SYM 250,  Diamo Velocity, Eton sport 50, JCL MP-150, Lance GSR 150, Schwinn, SYM sport 50, SYM VS125, Tomos Nitro 50, Vento Triton, VMOTO Monaco 125cc and other Korean, Chinese and Taiwanese scooters.and many others. Compatibility, however, is based on matching wiring and connectors. Please ensure your make and model have the same connector and number of pins prior to ordering.
  • Mechanics Note: According to our expert customers and the experts on the Scootdawg Proboards there is only one true way to know if you have an AC or DC system. Be sure your battery is fully charged and your fuse is good. Turn the key on, but DO NOT start your engine in this pin configuration

    [ 1 2 ][ 5 ]

    [ 3 4 ][ 6 ]

    If the #6 pin has 12v present, it is a DC fired system. If not then it is AC. Your AC system can have over 50v AC while cranking.


     

           

Clutch Bell, Performance, GY6-50, 139QMB & Upgrades 80cc - 125cc 101-1007-3001
$38.94 $29.95 Add to Cart

This is a ventilated Performance Clutch Bell for the GY6-50 and the 80cc through 125cc upgrades, 4 stroke, 139QMB base. This performance clutch bell housing fits a performance clutch. It will often be too large for a OEM clutch. We have the matching Performance Clutch part number 101-1007-0003 available for your convenience.  This great looking bell will not only perform well, but will keep your clutch running cooler.

Measurements:

  • I/D: 106.8mm
  • O/D:  118mm
Clutch Nut, Rear Clutch, (M10) GY6 50cc 139QMB F-1040-0010-FNS1.25
$3.84 $1.49 Add to Cart

This is a Rear Clutch Nut for the GY6-50cc 139QMB 1P39QMB scooter. (M10 x 1.25)

Clutch Springs, 1.5K 1500 RPM (Set of 3), Racing Performance 4-Stroke GY6 50cc 80cc 100cc  Chinese Scooter Moped ATV  Honda Dio 139QMB  1P39QMB 101-1029-1002
$12.94 $9.95 Add to Cart
5 out of 5 Stars!

These are Performance Clutch Springs that fit all clutches on the Chinese GY6 50cc 4-stroke and Honda Dio engines scooters, quads, mopeds, ATVs, go- karts, and buggies. These springs are available in 1K, 1.5K, and 2K spring rates. Feel the power!

Clutch Springs, 1K 1000 RPM (Set of 3), Racing Performance 4-Stroke GY6 50cc 80cc 100cc  Chinese Scooter Moped ATV  Honda Dio 139QMB  1P39QMB 101-1029-1001
$12.94 $9.95 Add to Cart

These are performance clutch springs that fit all clutches on the Chinese GY6 50cc 4-stroke and Honda Dio engines scooters, quads, mopeds, ATVs, go- karts, and buggies. These springs are available in 1K, 1.5K, and 2K spring rates. Feel the power! Spring colors will vary.

Clutch Springs, 2K 2000 RPM (Set of 3) Racing Performance 4-Stroke GY6 50cc 80cc 100cc  Chinese Scooter Moped ATV  Honda Dio 139QMB  1P39QMB 101-1029-1003
$12.94 $9.95 Add to Cart

These are performance clutch springs that fit all clutches on the Chinese GY6 50cc 4-stroke and Honda Dio engines scooters, quads, mopeds, ATVs, go- karts, and buggies. These springs are available in 1K, 1.5K, and 2K spring rates. Feel the power! Spring colors will vary.

Clutch Torque Spring, 1.5K 1500 RPM Racing Performance 4-Stroke GY6 50cc 80cc 100cc Chinese Scooter Moped ATV 139QMB 1P39QMB 101-1030-4002
$19.44 $14.95 Add to Cart

These are performance torque springs for the Chinese made GY6, 4T, 50cc engine 139QMB used on scooters, quads, mopeds, ATVs, buggies and go-karts. These come in 1K, 1.5K, and 2K spring rates. These are Performance Torque Springs to maximize your engine's torque and response. These top performing springs will give you back your acceleration, hill climbing ability and make your machine run as a top performer once again. Torque springs should be changed about every 800 miles because of heat and fatigue.

Mechanic Note: Torque Springs come in (3) different rates or RPM ratings, 1000 (1K) often Blue, 1500 (1.5K) often Yellow, and 2000 (2K) often RED. The lowest rated 1K may give you a higher speed overall but will engage at a lower RPM on take-off. If you or your scoot are heavy, you may be disappointed in the initial torque, take off and acceleration. The 1K will also have the hardest time "pulling the hills". On the other end the 2K will give you the greatest grabbing power and a higher RPM at take-off, and will pull the hills the best, but may be slower in speed overall. The 1.5K is in the middle. If you go with a heavier torque spring, you may want to go to a slightly higher variator roller or slider weight. At the same time, if you go to a lower RPM spring, you may need to go to a lighter weight. It is a fine line to find balance between torque spring and variator roller weight, achieved only through trial and error

Clutch Torque Spring, 1K 1000 RPM Racing Performance  4-Stroke GY6 50cc 80cc 100cc Chinese Scooter Moped ATV 139QMB 1P39QMB 101-1030-4001
$19.44 $14.95 Add to Cart

These are performance torque springs for the Chinese made GY6, 4T, 50cc engine 139QMB used on scooters, quads, mopeds, ATVs, buggies and go-karts. These come in 1K, 1.5K, and 2K spring rates. These are Performance Torque Springs to maximize your engine's torque and response. These top performing springs will give you back your acceleration, hill climbing ability and make your machine run as a top performer once again. Torque springs should be changed about every 800 miles because of heat and fatigue.

Mechanic Note: Torque Springs come in (3) different rates or RPM ratings, 1000 (1K) often Blue, 1500 (1.5K) often Yellow, and 2000 (2K) often RED. The lowest rated 1K may give you a higher speed overall but will engage at a lower RPM on take-off. If you or your scoot are heavy, you may be disappointed in the initial torque, take off and acceleration. The 1K will also have the hardest time "pulling the hills". On the other end the 2K will give you the greatest grabbing power and a higher RPM at take-off, and will pull the hills the best, but may be slower in speed overall. The 1.5K is in the middle. If you go with a heavier torque spring, you may want to go to a slightly higher variator roller or slider weight. At the same time, if you go to a lower RPM spring, you may need to go to a lighter weight. It is a fine line to find balance between torque spring and variator roller weight, achieved only through trial and error

Clutch Torque Spring, 2K 2000 RPM Racing Performance 4-Stroke GY6 50cc 80cc 100cc Chinese Scooter Moped ATV 139QMB 1P39QMB 101-1030-4003
$19.44 $14.95 Add to Cart

These are performance torque springs for the Chinese made GY6, 4T, 50cc engine 139QMB used on scooters, quads, mopeds, ATVs, buggies and go-karts. These come in 1K, 1.5K, and 2K spring rates. These are Performance Torque Springs to maximize your engine's torque and response. These top performing springs will give you back your acceleration, hill climbing ability and make your machine run as a top performer once again. Torque springs should be changed about every 800 miles because of heat and fatigue.

Mechanic Note: Torque Springs come in (3) different rates or RPM ratings, 1000 (1K) often Blue, 1500 (1.5K) often Yellow, and 2000 (2K) often RED. The lowest rated 1K may give you a higher speed overall but will engage at a lower RPM on take-off. If you or your scoot are heavy, you may be disappointed in the initial torque, take off and acceleration. The 1K will also have the hardest time "pulling the hills". On the other end the 2K will give you the greatest grabbing power and a higher RPM at take-off, and will pull the hills the best, but may be slower in speed overall. The 1.5K is in the middle. If you go with a heavier torque spring, you may want to go to a slightly higher variator roller or slider weight. At the same time, if you go to a lower RPM spring, you may need to go to a lighter weight. It is a fine line to find balance between torque spring and variator roller weight, achieved only through trial and error

Clutch, Racing High Performance  4 Stroke, GY6 50, 139QMB 101-1007-0003
$51.94 $39.95 Add to Cart

  • This is a racing high performance clutch for the 4 stroke GY6 50cc 139QMB engine.

 

  • This performance clutch often requires a Performance Clutch Bell and may not fit your OEM bell. If it does not fit your OEM bell, we have the matching performance clutch bell housing part number 101-1007-3001

 

  • Measures Approx. 3 7/8", 99mm on the back plate 

 

  • This clutch has high friction clutch pads, rigid backing plates and actuation arms, and performance clutch springs.
Coil, High Performance, 4T, GY6 50 125 150, & CFmoto 250, Baja, CFmoto, JMStar, Jonway, Lance, NST, Roketa, Sunl, Tank, TNG, Vento, VIP 201-1008-0002
$25.94 $19.95 Add to Cart

This is a high performance ignition coil for all GY6, 4-stroke engines including the 50cc, 125cc, 150cc, and 250cc Chinese engine. This coil will greatly increase your spark and improve your performance, acceleration, starting, and fuel mileage. These are easy to install on any engine. This coil fits the 139QMB, 152QMI, 152QMJ, 157QMI, 157QMJ, CF250 and 172MM. This fits the GY6 on Baja, JMStar, Jonway, Lance, NST, Roketa, Sunl, Tank, Tomos, TNG, Vento, VIP and many others.
 
Mechanic Note : There is no guarantee of performance because engines may have other performance issues. Check out our rebuild kits to go to the next step!

Coil, Red Hot-High Energy,  4 Stroke, GY6 50 125 150cc, & CFmoto 250cc 201-1008-0003
$32.44 $24.95 Add to Cart

This is the highest energy, high performance ignition coil for the GY6 4-stroke 50cc, 125cc, 150cc and 250cc, 139QMB, 152QMI, 157QMJ and 172mm. This coil is hotter than our orange coil. This fits all GY6 scooters, quads, ATVs, mopeds and go-kart engines. These coils install with a simple bolt. These coils are found on Honda Helix, Jonway, JMstar, Roketa, Sunl, Tank, TGB, TNG and many others.

Coil/CDI, AC,  High Performance Race Ignition  Package, 4T, Baja, JMStar, Jonway, Lance, NST, Roketa, Sunl, Tank, Tomos, TNG, Vento, VIP 201-1008-0008
$48.75 $37.50 Add to Cart

This AC High Power Package is for upgrading the GY6 scooter, quad, moped, ATV or buggy with a 50cc, 125cc, 150cc engine. This kit includes an unrestricted advanced timing curve high performance racing CDI with our performance race ignition coil, in a cost saving kit. Get top performance in one easy step. This fits the 139QMB, 152QMI, 152QMJ, 157QMI, 157QMJ, CF250 and 172MM. This fits the GY6 on Baja, JMStar, Jonway, Lance, NST, Roketa, Sunl, Tank, TNG, Vento, VIP, VIP Future Champion and many others.

 

Mechanics Note:  This Performance Coil can be used in either AC or DC.  According to our expert customers and the experts on the Scootdawg Proboards there is only one true way to know if you have an AC or DC system. Be sure your battery is fully charged and your fuse is good. Turn the key on, but DO NOT start your engine. In this pin configuration

[ 1 2 ][ 5 ]
[ 3 4 ][ 6 ]

if the #6 pin has 12v present, it is a DC fired system. If not then it is AC. Your AC system can have over 50v AC while cranking.

Coil/CDI, DC, High Performance  Ignition Kit, GY6, Eton, SYM, Tomos, Vento 201-1008-0009
$64.94 $49.95 Add to Cart
4 out of 5 Stars!

This is a 6-pin DC fired CDI with Unrestricted Rev Limits and an Advanced Timing curve for high performance. . These are found on the Baja SC50 Sun City, Diamo Velocity, Eton sport 50, Schwinn, SYM sport 50, SYM VS125, Tomos Nitro 50, Vento Triton, VMOTO Monaco 125cc and other Korean, Chinese and Taiwanese scooters. These fit the 139QMA engine type. (These may perform or work correctly with Eton Beamer or Sym Jet Euro 50) For this CDI your engine will have a 3-phase type generator and regulator/rectifier.

This coil will greatly increase your spark and improve your performance, acceleration, starting, and fuel mileage. These are easy to install on any engine. This coil fits AC or DC in the 139QMB, 152QMI, 152QMJ, 157QMI, 157QMJ, CF250 and 172MM and others.

 Mechanics Note: This Performance Coil can be used in either AC or DC.  According to our expert customers and the experts on the Scootdawg Proboards there is only one true way to know if you have an AC or DC system. Be sure your battery is fully charged and your fuse is good. Turn the key on, but DO NOT start your engine. In this pin configuration

[ 1 2 ][ 5 ]
[ 3 4 ][ 6 ]

Test the #6 pin to seeif it has 12v present. If it has 12v then it is a DC fired system. If not, then it is AC. Your AC system can have over 50v AC while cranking.

Cylinder Dowel Kit, (Set of 4), GY6-50, 4 Stroke, 139QMB B-100-1010-5001
$6.95 $4.95 Add to Cart

This is a complete replacement set of engine locator dowels (4) (O/D M8 x 14mm  I/D M7) for the 4 stroke GY6 50cc 139QMB engine. Theses dowels go between the crankcase, cylinder and head.

Cylinder Head, Non-EGR, (47mm), 80cc Big Bore, GY6-80, Fully Assembled, 139QMB, Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50,  Vento, VIP 101-1010-0015
$79.95 $59.95 Add to Cart

Cylinder Head, Non-EGR, (47mm), GY6-80,  for the GY6 80cc Big Bore Kit, Good quality casting, machined to fit the larger combustion chambers.  This head has the standard size intake and exhaust valves. This cylinder head fits the 80cc kit on Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50, Vento, VIP and many others..

Cylinder Head, Non-EGR, (50mm) 100cc Big Bore, GY6-100, Fully Assembled, 139QMB, Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50,  Vento, VIP 101-1010-0013
$79.95 $59.95 Add to Cart

This is a Non-EGR, 50mm Big bore Cylinder Head Assembly with the head, valves, springs, studs, seals and seat, aalready installed for the 100cc upgrade kit.  This has the standard size intake and exhaust valves.  This head is the minimium required to do the 100cc upgrade to the GY6-50 engine.  This head fits the 100cc kit on Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50, Vento, VIP and many others..

Cylinder Head, Non-EGR, (52mm), 139QMB, for GY6 50 to125cc Big Bore Kit 101-1010-0016
$149.95 $107.95 Add to Cart

Cylinder Head, Non-EGR, (52mm), for the GY6 50 to 125cc Big Bore Kit, Good quality casting, machined to fit the larger combustion chambers.

Cylinder Head, Non-EGR, 139QMB (50mm), High Performance Large Valves, Fully Assembled, 100cc Big Bore, GY6-100, Baja, JMstar, Jonway, Lance, NST, Roketa, Sunl, Tank, TNG, Vento, VIP 101-1010-0010
$194.94 $129.95 Add to Cart

This is a 50mm High Performance Racing Cylinder Head,  for the GY6-50 139QMB Big Bore upgrade to the (50mm) GY6-100 Big Bore Kit. This Head will fit both the GY6-80 upgrade, but most preferably the GY6-100 (50mm) Big Bore Cylinder upgrade on the 139QMB block. This cylinder head has a 20mm Intake valve and a 23mm exhaust valve.  This is a direct bolt-on to the 139QMB 100cc Big Bore Kit, newly installed on the 139QMB base. This upgrade kit will fit the Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Tomos Nitro 50, Vento, VIP and many others with the 139QMB engine.

Cylinder Long Stud Bolt, 1 Pair, 176mm, M7x1.00, GY6-50 139QMB B-100-1010-4001
$5.95 $3.49 Add to Cart

Cylinder Long Stud Bolt, 1 Pair, 176mm, M7x1.00, thread length 14mm &16mm, Crankcase Bolts, GY6-50, Quality, long studs for cinching down the entire top end.

Cylinder Stud Bolt Set, Complete Set of 4, GY6-50 139QMB engine 100-1010-4009
$19.95 $9.95 Add to Cart

Cylinder Stud Bolt Set, Complete Set of 4, for the GY6-50 139QMB engine.

Contains:

  • 2 - M7 x 1.00 x 168 Studs
  • 2 - M7 x 1.00 x 176 Studs
  • 4 - M7 Flanged Hex Nuts
Engine Cooling Shroud, for the GY6, 50cc engine 100-1048-0001
$19.44 $14.95 Add to Cart

This is a complete replacement Engine Cooling Shroud for the GY6 50cc 139QMB engine. This engine shroud will protect your engine and prevent overheating.  Replace yours today.

Exhaust Gasket Ring, 4T, GY6,  139QMB 50cc B-100-1013-2002
$5.14 $3.95 Add to Cart

This is a Exhaust Gasket Ring for the 139QMB, GY6, 50cc 4-stroke engine. Make your engine sound good again. This gasket fits Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP and many others.

Exhaust Muffler Bracket Clamp, 4 Stroke, GY6 50, 139QMB, Baja, Jonway, JMstar, Roketa, Sunl, Tank, TGB, TNG, Vento, VIP 100-1013-1000
$9.95 $6.95 Add to Cart

This is a replacement Exhust Muffler Bracket and Clamp to replace your broken or worn out one.  This clamp closes to 87mm (3.4") in diameter. This fits Baja, Jonway, JMstar, Roketa, Sunl, Tank, TGB, TNG, Vento, VIP and many more...

Exhaust Muffler System, High Performance Stainless Glass Pack, 4T,  GY6-50/80/100/110/125, Baja, JMStar, Jonway, Lance, Longbo, NST, Roketa, Sunl, Tank, TNG, Vento 101-1013-0002
$178.94 $129.95 Add to Cart
5 out of 5 Stars!

This is a very high quality  beautiful Performance Exhaust Muffler System for the GY6-50/80/100/110/125 (for Big Bore Kits on the GY6-50 base), 139QMB, 1P39QMB engine for top-end power. This is a glass-pack exhaust and muffler system with a great look and sound! This system includes the mounting hardware and head pipe.  This system sounds great! This fits Baja, JMStar, Jonway, Lance, Longbo, NST, Roketa, Sunl, Tank, TNG, Vento, VIP and many others. (Muffler alone measures 14")

Mechanic's Note: These mufflers have a great sound and they look great when installed. Some people have chosen not to put on the support brackets that are included with the muffler set, because they like that bright new look. This is a mistake. Please install all the brackets included with this Muffler Set. Once the muffler gets hot and is bounced with normal use, the muffler may break at stress points without the supports. Your new system will still look great!

Exhaust Muffler System, Performance, 4T, GY6 50  139QMB, JMStar, Jonway, Lance, Longbo, NST, Roketa, Sunl, Tank 101-1013-0004
$168.94 $129.95 Add to Cart
5 out of 5 Stars!

This is a beautiful and inexpensive Performance Exhaust Muffler System for the GY6 50cc 139QMB moped and scooter. This will give your scooter a great new look and sound! This system has a gold finish on the muffler and a chrome finish on the head pipe.  This system sounds great! This fits Baja, JMStar, Jonway, Lance, Longbo, NST, Roketa, Sunl, Tank, TNG, Vento, VIP and many others.  This is priced for any budget! (Muffler alone measures 14")

Mechanic's Note: These mufflers have a great sound and they look great when installed. Some people have chosen not to put on the support brackets that are included with the muffler set, because they like that bright new look. This is a mistake. Please install all the brackets included with this Muffler Set. Once the muffler gets hot and is bounced with normal use, the muffler may break at stress points without the supports. Your new system will still look great!

Exhaust Stud (6M x 1.0) and Muffler Cap Nut for 6mm GY6 50cc, 125cc, 150cc, Horizontal 50 -125 F-1040-0006-CAPN1.0
$4.95 $3.49 Add to Cart

Exhaust Stud (6M x 1.0) and Muffler Cap Nut for the 6mm GY6 50cc, 125cc, 150cc, Horizontal 50 -125

Exhaust Stud Bolt Set, 6mm (Set of 2), 4-Stroke, GY6 50cc, 125cc, 150cc B-100-1013-3000
$5.14 $3.95 Add to Cart

This is a replacement exhaust stud bolt set (M6 x 1.0 x 32mm)is for the 4-stroke, GY6 50cc and some 125cc and 150cc engines. These directly replace the stock bolts.

Exhaust Stud Bolt Set, 8mm (Set of 2), 4-Stroke, GY6 125cc, 150cc B-200-1013-3001
$5.35 $3.95 Add to Cart

Exhaust Stud Bolts, (1 Pair) M8x1.25 for the 172MM 250cc 4-stroke water-cooled CF250 CN250 engines and GY6 125cc/ 150cc  and the ZNEN GY6 150cc 4-stroke engines found on the Bintelli, Gorilla Motor Works (GMW) and Puma scooters and many others makes & models.

Exhaust Stud Nuts, 1 Pair (2),  GY6 50cc, 125cc, 150cc, 6M Locking, Alloy F-1040-0006-CN1.00
$4.95 $2.95 Add to Cart

This is one pair (2) nut fasteners for the GY6 Exhaust Stud Bolts.  This is made from a special aircraft alloy metal that withstands high temperatures.  This is a locking nut to handle the vibrations.  Also, this nut will not rust or corrode, making it much easier to change or remove at some later date.

Flywheel - Rotor Nut, (M10), GY6 50cc, 139QMB F-1040-0010-FNS1.25
$3.84 $1.49 Add to Cart

This is a replacement Flywheel Rotor Nut and Clutch Nut for the GY6-50 139QMB engine to replace your stripped out, worn out or lost original. (M10 x 1.25 cerrated)

Flywheel - Rotor Nut, Clutch Nut, (M10), GY6 50cc, 139QMB F-1040-0010-FNSL1.25
$3.84 $1.49 Add to Cart

This is a replacement Flywheel Rotor Nut and Clutch Nut for the GY6-50 139QMB engine to replace your stripped out, worn out or lost original. (M10 x 1.25 cerrated)

Flywheel Rotor Puller Tool,  GY6 50 125 150 100-1032-5000
$25.94 $24.95 Add to Cart

This is a quality a reversible flywheel puller tool for the 4 stroke GY6 50cc, 125cc, and 150cc scooter, quad, buggy, and ATV engine. This tool is a "must have" for the tool box and is ideal for making the job much easier.

Fuel Valve, (3 way In-line),  Chinese Scooter Gas Fuel Tank Petcock Valve GY6 50cc 150cc Moped ATV 1-1016-1001
$19.44 $14.95 Add to Cart

This is an easy to install, single bolt mount, 3-way, 3-port in-line vacuum operated fuel valve petcock (aka fuel pump) for many engines including the GY6 engine. This valve can be found on the Adly, Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP, and many others... We ship the same day as ordered, for quick service!

Mechanics Note: If the diaphragm inside this valve fails, it will supersede your carburetor float valve and cause your engine to flood to where it will cause it to lock-up while sitting. This valve has a single bolt mount for easy installation. . Get quality products you can trust from us!

Gasket Set, Complete, (47mm), GY6-80, 80cc Big Bore Upgrade,139QMB Base 101-1017-0002
$24.95 $19.95 Add to Cart

Gasket Set, Complete, (47mm),  quality gasket set for 47mm (80cc Big Bore Kit), on the GY6-50 139QMB base,  for scooters ATV, buggies, mopeds with the Chinese engine, sometimes referred to as the GY6-72. Fits Baja, JMstar, Jonway, Longbo, Roketa, Sunl, Tank, Vento, TNG, VIP and many more with this engine.

Gasket Set, Complete, (50mm), GY6-100, 100cc Big Bore Upgrade,139QMB Base 101-1017-0003
$25.94 $19.95 Add to Cart
5 out of 5 Stars!

This is a Complete Gasket Set for the Big Bore 100cc upgrade kit. on the GY6-5- 139QMB base.  This has all your gaskets in one easy package.

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Gasket Set, Complete, (52mm), Long Case GY6-125, 125cc Big Bore Upgrade,139QMB Base 101-1017-0018-L
$24.95 $19.95 Add to Cart

Gasket Set for the long case (10 bolt) 125cc Big Bore kit on the Gy6-50 139QMB base. GY6-50 139QMB base upgrade to 125cc

Gasket Set, Complete, (52mm), Short Case GY6-125, 125cc Big Bore Upgrade,139QMB Base 101-1017-0018-S
$24.95 $19.95 Add to Cart

Gasket Set, Complete, Short Case (8 bolt) 52mm,125cc Big Bore Kit on  the GY6-50 139QMB base.  GY6-50 139QMB base upgrade to 125cc

Gasket Set, Complete, Long Case, (10 Bolts), (39mm OEM Replacement), 4 Stroke, GY6 50, 139QMB, 1P39QMB 100-1017-0001-L
$12.95 $9.95 Add to Cart

This is a Complete OEM replacement Engine Gasket Set for the stock Long Case (10 bolt belt cover) 39mm 4 stroke GY6 50cc, 139QMB engine. This complete gasket set fits the Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP and many others.

Gasket Set, Complete, Short Case, (8 Bolts), (39mm OEM Replacement), 4 Stroke, GY6 50, 139QMB, 1P39QMB 100-1017-0001-S
$12.95 $9.95 Add to Cart

This is a Complete OEM replacement Engine Gasket Set for the stock Short Case (8 bolt belt cover) 39mm 4 stroke GY6 50cc, 139QMB engine. This complete gasket set fits the Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP and many others.

Gasket Set, Head & Base Cylinder Gasket, (50mm) GY6-100 Big Bore, GY6-50 139QMB Base 101-1017-1021
$15.95 $10.95 Add to Cart

This is the Head & Base Cylinder Gasket, for the 50mm GY6-100 Big Bore on the GY6-50 139QMB base.

Gasket Set, Head & Base Cylinder Gasket, (51mm) GY6-110 Big Bore, on theGY6-50 139QMB base 101-1017-1022
$15.95 $10.95 Add to Cart

This is the Head & Base Cylinder Gasket, for the 51mm GY6-110 Big Bore on the GY6-50 139QMB base.

Gasket Set, Head & Base Cylinder Gasket, (52mm) GY6-125 Big Bore, on the GY6-50 139QMB Base 101-1017-1023
$15.95 $10.95 Add to Cart

This is the Head & Base Cylinder Gasket, for the 52mm GY6-125 Big Bore on the GY6-50 139QMB base.

Gasket Set, Head and Base, OEM Replacement, GY6-50, (39mm) 139QMB 100-1017-1020
$15.95 $10.95 Add to Cart

This is the Head and Base Gasket Set for the OEM Replacement, GY6-50, (39mm) 139QMB

Gasket,  Intake Manifold Insulator, 4 Stroke, GY6 50cc, 139QMB B-100-1020-0004
$3.84 $2.95 Add to Cart

This is the intake manifold gasket and sealing O-ring for the GY6, 4T, 139QMB, 50cc engine.

Mechanics Note: This gasket sits between the head and the manifold. Like the manifold, these will crack over time and leak air causing the engine to run poorly. We suggest you replace these whenever you change the manifold to avoid problems later. Keep these in stock!

M16 x 1.50, Flanged Locking Nut F-1040-0016-FLN1.50
$3.84 $1.49 Add to Cart

This is a M16 x 1.50, Flanged locking nut, Sunny-Style, for many application including the Wheel lock nut on the Handsome-Boy Scooters and 250cc 4-stroke water-cooled CN250 172mm engines.

Piston & Ring Set, (47mm/13mm Wrist Pin), GY6-80, for the Big Bore, 139QMB, Upgrade on GY6 50cc 101-1026-2007
$29.95 $24.95 Add to Cart

This is the Piston & Ring Set for the (47mm), GY6-80cc Big Bore kit. This complete rebuild set includes 47mm piston, rings, 13mm wrist pin and circlips.

Piston & Ring Set, (50mm/13mm Wrist Pin), GY6-100, for the Big Bore, 139QMB, Upgrade on GY6 50cc 101-1026-2009
$29.95 $24.95 Add to Cart

This is a High Compression, High Quality Tiawanese Piston & Ring Set for the (50mm), GY6-100 Big Bore kit. This complete rebuild set includes 50mm high compression piston, rings, 13mm wrist pin and circlips. This piston and wrist pin fits the stock 139QMB GY6-50 piston rod.

Piston & Ring Set, (50mm/15mm Wrist Pin), GY6-100, for the Big Bore, 139QMB, Upgrade on GY6 50cc 101-1026-2008
$29.95 $24.95 Add to Cart

This is the Piston & Ring Set for the (50mm), GY6-100 Big Bore kit. This complete rebuild set includes 50mm piston, rings, 15mm wrist pin and circlips.

Piston & Ring Set, GY6-110,  (51mm/13mm) 101-1026-2023
$39.95 $29.99 Add to Cart

Piston & Ring Set, GY6-110,  (51mm/13mm), 4T, Complete rebuild set for the110cc Big Bore Kit, includes 51mm piston, rings, 13mm wrist pin, circlips

Piston & Ring Set, Performance Parts  (52mm/13mm wrist pin)  GY6-125 on the 139QMB Base 101-1026-2011
$34.99 $29.99 Add to Cart

Piston & Ring Set, Performance Part  (52mm/13mm wrist pin), GY6-125 on the 139QMB base,  High Compression,  complete rebuild set includes 52mm high compression piston, rings, 13mm wrist pin, circlips

Piston and Ring Set, (44mm), Moly Coated, GY6-60, 139QMB Upgrade for the GY6 50cc and for Peace, VIP 101-1026-2005
$32.44 $24.95 Add to Cart

This is a complete Top Quality Moly Coated Piston and Ring Set for the 44mm GY6-60 rebuild on the GY6 50 139QMB, with a 60cc Big Bore Kit, and for the larger bore models such as the Peace Sports, VIP Future Champion and others. This set comes with the piston, a full set of rings, wrist pin, and circlips.

Piston Rings,  (47mm),  GY6-80, for the Big Bore, 139QMB, Upgrade on GY6 50cc 101-1026-1001
$25.94 $19.95 Add to Cart

These are High Quality Taiwanese rings that fit our 47mm Big Bore Kits used in the 139QMB GY6 upgrade to the GY6 80cc scooter, quads, ATVs, and buggies with Chinese engines. These fit many brands such as Jonway, JMstar, Roketa, Sunl, Tank, TGB, TNG, Vento, VIP and many more.

Mechanics Note:These rings are better than the original and will last and perform better. We recommend you use these with our new kits. Keep an extra set of rings on hand, they are easy to break.

Measurements:

  • Top & Second Ring Thickness:  .98mm
  • Side Rings (2): .40mm 
Piston Rings, (50mm), GY6-100, for the Big Bore, 139QMB, Upgrade from GY6 50cc 101-1026-1002
$32.44 $24.95 Add to Cart

These are High Quality 50mm Taiwanese Piston Rings for our GY6 100cc Big Bore Kits used in the GY6 50cc scooters, quads, ATVs, and buggies with Chinese engines. These fit many brands such as Jonway, JMstar, Roketa, Sunl, Tank, TGB, TNG, Vento, VIP and many more.

Mechanics Note:These rings are better than the original and will last and perform better. We recommend you use these with our new kits. Keep an extra set of rings on hand, they are easy to break.

Piston Rings, GY6-60, (44mm), 139QMB, Upgrade on the GY6-50, and for Peace, VIP 101-1026-1005
$12.94 $9.95 Add to Cart

This is a quality 44mm Ring Set for the smaller Big Bore GY6 60 upgrade on the 139QMB engine. These also fit larger bore 44mm models such as the Peace Sports, VIP Future Champion and others.

Spark Plug, C7HIX, Iridium High Performance, GY6, Sachs, Honda 101-1028-0007
$12.95 $9.95 Add to Cart

This is a German Quality Xtra Power Performance HMK C7HIX Spark Plug for the  horizontal Honda Trail style engines, Honda, Kawasaki KLX and KSR  2 valve Heads on the 49/86/90/110/120/125/140/150/160/170, and Sachs Madass . This plug also fits the GY6 4-stroke 50, 125 & 150cc engines in many models including the Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP, and many others. Service Manual recommend a gap:  .5 -.6mm (0.22 -.24 inches).

Spark Plug, C7HSA, NGK, Mid-Heat, GY6, Sachs, Honda 1-1028-0001
$3.85 $2.95 Add to Cart

This is a high quality NGK C7HSA (mid heat) spark plug for the  horizontal Honda Trail style engines, Honda, Kawasaki KLX and KSR  2 valve Heads on the 49/86/90/110/120/125/140/150/160/170, and Sachs Madass 125 . This plug also fits the GY6 4-stroke 50, 125 & 150cc engines in many models including the Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP, and many others. Many manuals recommend a gap of .5 -.6mm (0.22 -.24 inches).

  • Thread Size: 10mm
  • Hex Size: 16mm (5/8 inch)
  • Gap: 0.7mm (.028 inch)
  • Reach: 12.7mm (1/2 inch)
  • Heat Range: 7
  • Does not include terminal nut
Stator Tool, GY6-50/80/100/125/150, CF250 CN250,  4-stroke engine 1-1032-5002
$29.95 $24.95 Add to Cart

This handy fully adjustable Stator Tool will make the job of stator removal much easier.  This fully adjustable tool will help prevent damage to the stator and your engine.  Works on most 4-stroke scooter, ATV, buggy, and quad engines 

Variator Front Clutch Nut, (M12), GY6-50cc, 139QMB F-1040-0012-FNSL1.25
$3.84 $1.49 Add to Cart

This is the replacement Front Variator Clutch Nut to replace that stripped, worn out or lost original.  (M12 x 1.25)

Variator ROLLERS  16x13 (4g) Racing Performance Chinese GY6 50cc 139QMB 1P39QMB 101-1037-1004
$12.94 $9.95 Add to Cart

These are a high performance, fine quality copper-core rollers designed to give top performance without destroying your variator like the steel-core may do. These rollers are far superior to your original rollers.

Mechanics Note:

Heavier roller weights= A slower take off speed with more acceleration and a higher top speed.
Lighter roller weights = A faster take off speed with less acceleration and lower top speed.

Variator ROLLERS 16x13 (11g) Racing Performance Chinese GY6 50cc Scooter Moped ATV Baja, JMstar, Jonway, NST, Roketa, Sunl, Tank, TNG, Vento, VIP139QMB 1P39QMB 101-1037-1011
$12.94 $9.95 Add to Cart

These are a high performance, fine quality copper-core rollers designed to give top performance without destroying your variator like the steel-core may do. These rollers are far superior to your original rollers.

Mechanics Note:

Heavier roller weights= A slower take off speed with more acceleration and a higher top speed.
Lighter roller weights = A faster take off speed with less acceleration and lower top speed.

Variator ROLLERS 16x13 (5g) Racing Performance Chinese GY6 50cc, 139QMB 1P39QMB 101-1037-1005
$12.95 $9.95 Add to Cart

These are a high performance, fine quality copper-core rollers designed to give top performance without destroying your variator like the steel-core may do. These rollers are far superior to your original rollers.

Mechanics Note:

Heavier roller weights= A slower take off speed with more acceleration and a higher top speed.
Lighter roller weights = A faster take off speed with less acceleration and lower top speed.

Variator ROLLERS 16x13 (6g) Racing Performance Chinese GY6 50cc Scooter Moped ATV Baja, JMstar, Jonway, NST, Roketa, Sunl, Tank, TNG, Vento, VIP 139QMB 1P39QMB 101-1037-1006
$12.94 $9.95 Add to Cart

These are a high performance, fine quality copper-core rollers designed to give top performance without destroying your variator like the steel-core may do. These rollers are far superior to your original rollers.

Mechanics Note:

Heavier roller weights= A slower take off speed with more acceleration and a higher top speed.
Lighter roller weights = A faster take off speed with less acceleration and lower top speed.

Variator ROLLERS 16x13 (7g) Racing Performance Chinese GY6 50cc Scooter Moped ATV Baja, JMstar, Jonway, NST, Roketa, Sunl, Tank, TNG, Vento, VIP139QMB 1P39QMB 101-1037-1007
$12.94 $9.95 Add to Cart

These are a high performance, fine quality copper-core rollers designed to give top performance without destroying your variator like the steel-core may do. These rollers are far superior to your original rollers.

Mechanics Note:

Heavier roller weights= A slower take off speed with more acceleration and a higher top speed.
Lighter roller weights = A faster take off speed with less acceleration and lower top speed.

Variator ROLLERS 16x13 (8.5g) Racing Performance Chinese GY6 50cc Scooter Moped ATV Baja, JMstar, Jonway, NST, Roketa, Sunl, Tank, TNG, Vento, VIP139QMB 1P39QMB 101-1037-10085
$12.94 $9.95 Add to Cart

These are a high performance, fine quality copper-core rollers designed to give top performance without destroying your variator like the steel-core may do. These rollers are far superior to your original rollers.

Mechanics Note:

Heavier roller weights= A slower take off speed with more acceleration and a higher top speed.
Lighter roller weights = A faster take off speed with less acceleration and lower top speed.

Variator ROLLERS 16x13 (9g) Racing Performance Chinese GY6 50cc Scooter Moped ATV Baja, JMstar, Jonway, NST, Roketa, Sunl, Tank, TNG, Vento, VIP139QMB 1P39QMB 101-1037-1009
$12.94 $9.95 Add to Cart

These are a high performance, fine quality copper-core rollers designed to give top performance without destroying your variator like the steel-core may do. These rollers are far superior to your original rollers.

Mechanics Note:

Heavier roller weights= A slower take off speed with more acceleration and a higher top speed.
Lighter roller weights = A faster take off speed with less acceleration and lower top speed.

Variator ROLLERS, 16x13 (10g), Racing Performance, Honda Dio, GY6 50cc, 139QMB 1P39QMB 101-1037-1010
$12.94 $9.95 Add to Cart

These are a high performance, fine quality copper-core rollers designed to give top performance without destroying your variator like the steel-core may do. These rollers are far superior to your original rollers.

Mechanics Note:

Heavier roller weights= A slower take off speed with more acceleration and a higher top speed.
Lighter roller weights = A faster take off speed with less acceleration and lower top speed.

Variator Slide Set, Guides, (Set of 3), GY6 50cc,139QMB,  Honda Dio B-100-1037-0001
$3.84 $2.95 Add to Cart

These are the Variator Slide Set, Guides for the Chinese GY6-50, 139QMB, 50cc Variator. Guide for the front Variator clutch.  If worn, can cause belts to break.

Variator SLIDERS, 16x13 (10g) Racing Performance Chinese GY6 50cc Scooter Moped ATV Honda Dio 139QMB 1P39QMB 101-1037-1510
$24.95 $19.95 Add to Cart

Variator Performance Roller Polygon Slider Set, Dr. Pulley style, GY6-50/80/100, 139QMB, 16 x 13, (10g), (OEM GY6-50, Honda Dio 8.5g)