Compatible with OEM Part Numbers Yamaha 21W-11111-00-00, 1W7-11181-00-00,4AW-11351-00-00, 3E5-11631-00-97, 14N-11603-00-00, 93450-13022-00,93310-11268-00, 527-11633-00-00,18E-11311-00-00. Compatible with the 1983-2006 Yamaha PW80, 1986-1990 Yamaha BW80 Motorcycles. Includes Cylinder, Cylinder Head, Stud Kit, NGK Spark Plug, Namura Top End Kit - Piston, Piston Rings, Wrist Pin, Clips, Top End Bearing, Gasket Kit. The Standard Cylinder has a 47.00mm Bore and 45.60mm Stroke. The Cylinder Displacement is 79cc and has as 6.61 Compression Ratio.

Compatible with OEM Part Numbers Honda 12101-GC8-010, 12191-GZ4-790,12251-GC8-000, 13010-GC8-305,13111-GC8-000, 13101-GC8-000,13115-156-000, 12101-GC8-000. Compatible with the 1983-1985 Honda Aero 80 NH80MD. Includes Cylinder, Piston, Piston Rings, Clips, Wristpin and Head GasketBase Gasket. Cylinder Bore and Stroke 48.00mm x 44.00mm. Cylinder Displacement 79.5cc Compression 6.8 Cylinder Material Steel Cylinder Sleeve Coating None.

Cylinder Piston Gasket Top End Kit Replacement for Yamaha Moto 4 Raptor 80 Badger 80 Grizzly 80. Replacement Part Numbers Replacement for 22K-11311-02-00, 22F-11351-01-00, 55X-11181-00-00, C7H-SA000-00-00, 55X-11610-00-00, 93450-14088-00, 22K-11633-01-00, 55X-11631-00-96. Package Includes 1x Cylinder Bore Size 47mm, 1x Piston, 1x Piston Pin, 5x Rings, 1x Head Gasket, 1x Base Gasket,1x Spark Plug2x Circlipsas picture show. Feature With reasonable structure, easy installation, convenient operation and maintenance, reliable performance. Note Please compare your part with our product display pictures, make sure they have the same pattern and shape.

Compatible with Yamaha Cylinder 22K-11311-02-00. Compatible Part Numbers Base Gasket Yamaha 22F-11351-01-00, Head Gasket Yamaha 55X-11181-00-00. Compatible with Yamaha 2002-2008 Raptor 80 YFM80WYFM80R, 2005-2008 Grizzly 80 YFM80G. Compatible with Yamaha 1985-2001 Badger 80 YFM80, 1986-1987 Moto 4 80 YFM80. Cylinder Bore 48mm, 2 Stroke. Cylinder, Head Gasket, Base Gasket.

FITMENT Fit for most brand with GY6 80cc 100cc 139QMA 139QMB engine, such as Zongshen Lifan Sunl JCL Buyang Peace Haojue Loncin Jetmoto Kangdi SYM Jonway Taotao Coolster Baoyue Apollo Roketa. Dimension Piston Diameter 47 mm1.85 Piston Pin Diameter 13 mm0.51 The Length of Piston Pin 37 mm1.46 Black Gasket Diameter 50 mm1.97 Gray Gasket Diameter 57 mm2.24. High-Quality This GY6 piston is made of high-quality aluminum alloy material, which offers the advantages of being lightweight, having good thermal conductivity, excellent machinability, good wear and corrosion resistance, and high strength. These advantages effectively improve engine performance and reliability while extending the piston's lifespan. The piston is designed to withstand high temperatures and pressures and has undergone rigorous testing to ensure its quality. Package Include 1 x 1.8547 mm Piston, 5 x Piston Rings, 1 x 1.4637 mm Piston Pin, 2 x Piston Clips. AFTER SALEIf you have any questions or are not completely satisfied with your purchase, please leave us a message.

FITMENT High Performance Upgrade 52mm2.05 Cylinder Rebuild Kit for GY6 49cc 50cc 60cc 80cc 100cc engine.Top end rebuild kit compatible with most of Chinese Made Scooters and ATVs,such as JONWAY,JMSTAR,ROKETA,SUNL,TANK,PEACE,TAOTAO.. SIZEInner Diameter of Cylinder 52mm2.05Outer Diameter of Piston Pin 13mm0.51.An aftermarket engine kits affordable and easy to install with all necessities.. REBUILD OUR COMPLETE ENGINETop end rebuild kits contains all necessary to rebuild the top end on our motorcycle or ATV.Package include Cylinder x1,Piston Kit x1,Piston Ring Set x1,Gasket Kit x1,Spark Plug x1,Industrial Gloves x2.. HIGH QUALITY MATERIALThe powersports engine kits are made of durable material.Piston kits are made of strong aluminium, with excellent wear resistance,fatigue resistance,corrosion resistance and high temperature resistance.. GOOD SEALING PERFORMANCECylinder piston ring gasket kit with precise density to provide a reliable seal with minimal tightening.A pair of industrial gloves for you to keep your hands clean and protected while you install the product.. RELIABLE A7TC SPARK PLUGHigh quality alloys and new ceramic insulators processed by precision instruments make the spark plug wear-resistant, high-temperature resistant,safe,long-lasting.Effectively prevent the gas from leaking out and prevent the engine from shaking..

Easy Installation Universal FitDesigned for effortless installation, compatible with 47mm Bore 4-stroke GY6 80cc, 139QMA, 139QMB engines, and fits scooters, mopeds, go-karts, and ATVs seamlessly.. Premium Material DurabilityMade from high-quality materials with corrosion resistance and wear resistance, featuring a thickened shell for enhanced durability and long-lasting performance.. High Performance Efficient CoolingDelivers strong power with super heat dissipation design, ensuring stable operation, oil-saving efficiency, and consistent performance under heavy use.. Robust Construction ReliabilityHigh-toughness build with rustproof properties and optimized heat dissipation structure, guaranteeing reliable performance and extended service life.. Precision Engineering ProtectionFine-manufactured with corrosion-resistant and durable features, ensuring protection against harsh conditions for sustained optimal performance..

Precise 47mm 1.85 Bore Diameter 13mm 0.51 Piston Pin Engineered to exact OEM specifications for seamless fitment in GY6 80cc 139QMB139QMA engines. Complete Top-End Rebuild Kit Includes pistons, piston rings, piston pins, cylinder gasket, and spark plug everything needed for a full, reliable engine overhaul in one box. High-Strength Alloy Construction Advanced metallurgy delivers superior wear resistance and thermal stability under extreme operating conditions, significantly extending engine lifespan. Precision-Machined Surface Finish Mirror-smooth piston walls reduce friction against cylinder bores, while elastic piston rings ensure consistent sealing and optimal compression retention. Rigorous Quality Control Each component is CNC-machined to tight tolerances and inspected for dimensional accuracy, ensuring flawless performance and safe operation on every install.

FITMENT High Performance Upgrade 47mm Cylinder Rebuild Kit for GY6 49cc 50cc 60cc 80cc engine.Top end rebuild kit compatible with most of Chinese Made Scooters and ATVs,such as JONWAY,JMSTAR,ROKETA,SUNL,TANK,PEACE,TAOTAO.. SIZEInner Diameter of Cylinder 47mm1.85Outer Diameter of Piston Pin 13mm0.51.An aftermarket engine kits affordable and easy to install with all necessities.. REBUILD OUR COMPLETE ENGINETop end rebuild kits contains all necessary to rebuild the top end on our motorcycle or ATV.Package include Cylinder x1,Piston Kit x1,Piston Ring Set x1,Gasket Kit x1,Spark Plug x1,Industrial Gloves x2.. HIGH QUALITY MATERIALThe powersports engine kits are made of durable material.Piston kits are made of strong aluminium, with excellent wear resistance,fatigue resistance,corrosion resistance and high temperature resistance.. GOOD SEALING PERFORMANCECylinder piston ring gasket kit with precise density to provide a reliable seal with minimal tightening.A pair of industrial gloves for you to keep your hands clean and protected while you install the product.. RELIABLE A7TC SPARK PLUGHigh quality alloys and new ceramic insulators processed by precision instruments make the spark plug wear-resistant, high-temperature resistant,safe,long-lasting.Effectively prevent the gas from leaking out and prevent the engine from shaking..

Transform an ordinary bicycle into a thrilling motorized ride with our 2-stroke 80cc engine kit. Reach speeds up to 38 kmh, delivering motorcycle-like acceleration and scooter-level convenience for faster, more exciting daily commuting and leisure riding.. Universally designed to fit most 26 and 28 V-frame bikes, including mountain, cruiser, chopper, and road models. Requires 911 inches of clearance between the bottom bracket and top bar, and fits frame tubes with a diameter of 2529mm approx. 1 inch. Engineered for strong performance with a 47mm bore and 40mm stroke, producing up to 5 HP at 6000 rpm. Highly fuel-efficient at just 2.5L per 100km, providing excellent power output while keeping running costs low.. Compatible with standard 2-stroke engine oil or 10W-3010W-40 motor oil. For optimal durability, use a fuel-oil mix ratio of 161 during the break-in period, then switch to 201 after 500km.. Easy to install with basic mechanical skills and common hand tools, typically completed in 23 hours. For maximum engine protection and longer service life, add a small amount of lubricating oil into the cylinder.

Fit GY6 50cc-100cc 69mm 4 Strokes 139QMB or 139QMI engines Scooter. Cylinder HeadIntake Valve OD 18mmExhaust Valve OD 16mm Head Assembly with 69mm. Valves 100cc Cylinder Diameter 50mm Wrist Pin OD 12.77mm. Fit ModelsFor scooters with 139QMB or 139QMI engines Scooter. Before ordering check your head assembly for the correct valve length..

Cylinder kit for 4 stroke GY6 80cc 139QMA 139QMB Engine Chinese ATV Quad 4 Wheeler Go Kart Moped Scooter. Inner Diameter of Cylinder 47mm. High toughness,corrosion resistance,rustproof and durable.Has a good heat dissipation structure design,providing reliable performance and long life service. Package including 1PC x 47mm cylinder body,2PCS x gasket,2PCS x oil seal and piston kit Piston Ring,Piston Pin,Piston Pin Clip,Tensioner Gasket,Exhaust Gasket,IntakeExhaust Studs,Exhaust Nut. If you have any questions regarding our products, please feel free to contact us before making your purchase. We will respond within 24 hours..

Fitment Replacement for 66cc 80cc 2 Stroke Engine Motorized Bicycle. Wide Compatibility This 40mm big bore piston ring kit fits a wide range of 2-stroke engines including 43cc, 47cc and 49cc gas scooters, mini pocket bikes, ATVs, and quad bikes, ensuring that the user gets good performance on a wide range of equipment. Performance Design Featuring a precise bore design 40mm 1.6, the 2 stroke engine cylinder piston kit 40mm big bore is designed to increase engine output and acceleration, helping users experience more power and smoother handling while riding. Endurance Property Piston gasket kits have a precise density that provides good sealing performance, preventing oil leaks and reducing wear. This manufacturing of piston gasket not only extends the life of the engine, but also reduces the frequency of maintenance. Easy Installation For users with some do-it-yourself skills, this DIY approach not only saves on installation costs, but also improves understanding and maintenance of the vehicle, saving time and energy.

Wide ApplicaionRacing Carburetor Motorized Bike Parts Engine Kit Fits 2 stroke 49cc 66cc 70cc 80cc engine With No Adjusting Throttle, Motorized Bicycle Parts for Moto Bike Bicycle Scooter Moped Dirt Bike.. Improve Engine PerformanceImprove throttle response for better engine performance, Pefect Idle and Top Accelerator Status, help to keep your bikes Scooter running at Top performance.. Strict StandardRacing Carburetor Motorized Bike Parts Engine Kit is Made of high quality metal material,durable and long service life,not easy to break.Built under strict standard control,ensure the fuel tank have most reliable performance.. NoteYou have to wrap several layers of thread tape around it if you are replacing the NT carb that came with your 6680cc bicycle engine, and if you are at a higher elevation you may need to change jet size for this carburetor to run properly.. SizeRacing Carburetor Manifold intake Bore Diameter 19mm Air filter side Mounting Diameter 58mm..

Wide Applications - This aftermarket lt80 top end kit fit for Suzuki Quadsport LT80 1987-2006 for Kawasaki KFX80 ATV's 2003-2006. Part Number - 1121040B01.Heavy duty metal construction, tested for good reliability and performance. Premium Quality - This engine piston cylinder gasket head kit is made of high-strength aluminium material,can effectively improve heat,pressure,high temperature and corrosion resistance.Direct fit,no modification needed,easy to use and install. Specification - This Cylinder has a 50.00mm Bore and 42.00 mm Stroke1.971.65. Package Contents - 1x Cylinder Block 1x Piston 1x Piston Pin 1x Bearing 2x Circlips 1x Piston Ring Set 1x Head Gasket 1x Cylinder Gasket 4x FREE Cylinder Bolts 4x FREE Bolt Nuts 1x FREE Spark Plug 1x Thread Lock.

Fits for YAMAHA PW80 80cc 1983-2006Replace Part Number 21W-11111-00-00, 1W7-11181-00-00, 4AW-11351-00-00, 3E5-11631-00-97, 14N-11603-00-00, 93450-13022-00, 93310-11268-00, 527-11633-00-00, 18E-11311-00-00. Piston Diameter Cylinder Bore Size approx 47mm. Vehicle displacement80cc. Package Includes 1x Cylinder Bore 47 mm, 1x Cylinder Head Cover, 2x Gaskets, 1x Piston, 2x Piston Clip, 2x Piston Circlips, 2x Piston Rings, 1x Needle Bearing, 1x Spark Plug, 4x Bolts, 4x Nuts. Please allow 0.5-1mm error due to manual measurement. Thanks for your understanding.. Please check whether your model and parameters are consistent with ours..

Perfect Fit for 47mm Specifically designed for GY6 80cc Big Bore 4-stroke engines with a 47mm cylinder bore. Fully compatible with 139QMB and 139QMA engine codes.. Essential 2-Piece Set Includes 1x Cylinder Head Gasket and 1x Cylinder Base Gasket. This kit focuses on the core sealing components needed for your engine rebuild.. Superior Sealing Made of premium heat-resistant materials to prevent oil leaks and maintain stable engine compression for long-term durability.. Wide Compatibility Fits most Chinese scooters, ATVs, and Go Karts, including TaoTao, Peace, Icebear, Wolf, Jonway, and more.. Important Note This set includes the head and base gaskets ONLY. Timing chain tensioner gasket is NOT included. Please verify your bore size before ordering..

COMPATIBILITY Cylinder high performance upgrade 47mm Rebuild Kit fits for 139QMB 139QMA Engine.This a Non EGR Cylinder Head, Does Not Have the EGR Port. SIZE Inner Diameter of Cylinder Sleeve 47mm,Outer Diameter of Piston Pin 13mm,Valve Length-69mm, Intake Valve Diameter- 18.5mm, Exhaust Valve Diameter-16mm. HIGH PERFORMANCECylinder kit is strong power,super heat dissipation,durable and oil saving,stable performance. HIGH QUALITYHigh grade cylinder components, featuring high strength, corrosion resistance, and durability, with effective heat dissipation design ensuring dependable operation and longevity. PROFESSIONAL AFTER SALESWe value your shopping experience and strive to offer a high-quality product and service.If you have any problems or dissatisfaction after receiving the products, please contact us directly.

Cylinder bore 47mm1.85 Intake valve 20mm0.78 Pin installation spacing 45mm1.77 Exhaust valve 30mm1.18 Pin installation spacing 50mm1. 96 Piston Bore 47mm1.85 Piston Pin Diameter 13mm0.51 Piston Pin Length 37mm1.45 Spark Plug A7TC Please carefully check the goods appearance, size, shape before ordering.. 47mm Big Bore Cylinder Rebuild Kits Replacement Kits for 80cc 4 stroke 139QMB 139QMA GY6 ATV Go Kart Quad Scooter.Non-EGR Engine.. Cylinder rebuild kits is an ideal replacement for your old or broken ones.. The cylinder head with high hardness, corrosion resistance, rustproof and durable, support the piston and reduce friction and leakage, providing reliable performance and long life service.. Warranty We are always available to help our customers.if you are not satisfied with the order,please leave us a message.we wish you have a happy shopping experience,we are committed to provide the best service..

Fits 50cc100cc 4 Stroke GY6QMB139 engines. 6 5 grams roller weights. 3 7 grams roller weights. Rollers can be combined to achieve 5,6 and 7 grams setups.. Improves acceleration and top end speed compared to stockrestricted cvt..

This big cylinder kit will upgrade your gy6 50cc 60cc 80cc to 100cc, without EGR, to get more RPM,more power, faster maximum speed.. 69mm valve length version. Simple Installation. With cylinder body kits, cylinder head kits, camshaft, camshaft seat kits, gaskets kits, oil pump and gear, spring sets, copper roller sets, 6pins racing AC CDI, ignition coil and racing 3-electrode spark plug. Upgrades parts kits for most of 50cc scooter.

Cylinder Bore 47mm Non-EGR Cylinder. Valve length 69mm. Apply to GY6 4 stroke 49cc 50cc 60cc 80cc engine upgrade for most of chinese scooter, atv and go karts. Parts includedGY6 80cc Cylinder Head with 69mm valve, 47mm Bore Cylinder Block, Set of 47mm Piston Assy, Piston, Rings and Wrist Pin, Full Set of Engine Gasket, 6pins CDI, Ignition coil, 4pin AC regulator, relay, A7TC Spark Plug, Set of Intake Manifold and Muffler Bolts, and Exhaust locking ha, Set of 8.5 Gram roller , 69mm Rocker Arms, Valve Seals, Oil Pump Assy with Driving Gear, Camshaft, Camshaft chain 82, belt 6991830, Chain adjuster, Oil screen, spring, cover and oil seal, Starter clu. Fit toRoketa, Sunl, Baja, Taotao, Panterra, Redcat Tank Giovanni Wildfire Xtreme Seaseng Qlink Yiben Jonway Jmstar, Vento.

CDHpower New Cylinder body Iron Sleeve. Inner Diameter of Cylinder body 49mm which is compatible with cdhpower new cylinder body. This Cylinder is compatible with standard 66cc80, but not yd100. The Cylinder is better replacement of standard 66cc80cc cylinder, make more power and more fun. The Package including new cylinder, gasket, Attention the lining is the iron sleeve, there may be a little rust when receiving the goods, but it does not affect the normal use, it can be cleaned with oil or lubricating oil.

Performance V100 cylinder body with 50mm bore. We suggest clean the ports, hone the cylinder, wash the cylinder in gasoline before using Due to Steel Sleeve inside of cylinder maybe cause a little rusing, buyers should put engine oil or something else to clean up the rusting before intallation. Material of cylinder steel and iron Intake Stud Spacing 40mm, Muffler Stud Spacing 40mm. Performance reed valve with OD 19mm intake. Windowed piston, Excluding piston pin and clips.

Performance V80 cylinder body with 47mm bore. We suggest clean the ports, hone the cylinder, wash the cylinder in gasoline before using Due to Steel Sleeve inside of cylinder maybe cause a little rusing, buyers should put engine oil or something else to clean up the rusting before intallation. Material of cylinder steel and iron Intake Stud Spacing 40mm, Muffler Stud Spacing 40mm. Performance reed valve with OD 19mm intake. Windowed piston, Excluding piston pin and clips.

Package include 1pc V100 Cylinder and Piston Kit Excluding piston pin and clips, 1pc Extra V100 Piston Kit. Performance V100 cylinder body with 50mm bore. We suggest clean the ports, hone the cylinder, wash the cylinder in gasoline before using. Material of cylinder steel and iron Intake Stud Spacing 40mm, Muffler Stud Spacing 40mm. Performance reed valve with OD 19mm intake, Windowed piston, Excluding piston pin and clips.

Inner Diameter of Cylinder 47mm,Outer Diameter of Piston Pin 13mm. Include Cylinder,Piston,Piston Ring,Piston Pin,Piston Pin Clip,Valve Oil Seal,Gaskets,Tensioner Gasket,Exhaust Gasket,IntakeExhaust Studs,Exhaust Nut. One week money back guarantee if not satisfied. Easy installation with video instruction,you can visit the video on our Facebook homepage and Youtube.. High Performance Upgrade 47mm Cylinder Rebuild Kit for GY6 49cc 50cc 60cc 80cc engine.

1.Inner Diameter of Cylinder 47mm. 2.Outer Diameter of Piston Pin 13mm. 3.High Quality Durable Piston Rings. 4.Include Cylinder,Piston,Piston Ring,Piston Pin,Piston Pin Clip,Valve Oil Seal,Gaskets,Tensioner Gasket,Exhaust Gasket,IntakeExhaust Studs,Exhaust Nut. 5. High Performance Upgrade 47mm Cylinder Rebuild Kit for GY6 49cc 50cc 60cc 80cc engine.

This big cylinder kit will upgrade your gy6 50cc 60cc 80cc to 100cc, without EGR, to get more RPM,more power, faster maximum speed.. 69mm valve length version. With cylinder body kits, cylinder head kits, camshaft, camshaft seat kits, gaskets kits, oil pump and gear, spring sets, copper roller sets, 6pins racing AC CDI, ignition coil and racing 3-electrode spark plug. Simple Installation. Upgrades parts kits for most of 50cc scooter.

This kit can be only used for GY6 139QMB 4 Stroke Engine.. Inner Diameter of Cylinder 50mm,Outer Diameter of Piston Pin 13mm. Upgrade your engine from 50cc to 100cc. Your vehicle will get more power with this item,easier to climb hill than ever before.

Use Large Valve Heads to Get More Power for Your GY6 139QMB 139QMA 147QMD Scooter ATV Go Kart Engine. This Big Bore Rebuild Kit Comes with 18.520.5mm Large Valve Cylinder Head Assy Stock is 1618.5mm.. Compatible with 69mm Long Valve Style Heads. If your Original Head Has 64mm Valves, Please Must Change Your Rocker Arms with The Ones in Our Kit.. Glixal Piston Rings DLC Wear Resistant Coating. This Coating will Also Reduce the Friction Coefficient to Protect the Cylinder Sleeve.. Please Note The Engine Side Cover Gasket is for a Short Case Version 8 Bolt.. Attention AT marking face to the piston, the 6mm small hole goes up or away from the Motor .

Specification Upgrade Cylinder size 50mm, Piston 50mm,Valve69mm64mm, Clutch Spring1500RPM,. Advantage A9 crankshaft, High Performance CDI, Ignition coil,Spark Plug, 6.5g Copper Roller.. Fitment kit fits for most 49cc 50cc Chinese scooters mopeds ATVs equipped with 139QMB 139QMA 4 stroke engine. Such as Taotao, Jonway, Jmstar, Roketa, Sunl, Sunny, Vitacci, Icebear, Lance, Xpro, Tank, Peace, Dongfang, Kazuma, JCL, BMS, Baja, Baccio, Eagle, Urban, Panterra.. Compatibility Taotao 49cc 50cc scooter mopedVIP Future Champion 50 ATM50-01 Pony 50 Thunder 50 CY50-A, CY50-B, CY50-T3 New Speed 50 EVO 50 Blade 50 Classic 50 Euro 50cc, Baja SC50, Jonway 50cc, Vitacci 50cc, Roketa 50cc, Jmstar 50cc, Wol 50cc scooterRX50 Islander V50 Rugby, Ice Bear 50cc, Lance 50cc , Wildfir 50cc, X-Pro 50cc, Sunl 50cc, Sunny 50cc, Peace Sports 50cc, Zongshen 50cc, Tank 50cc, Panterra 50cc, Piaggio 50cc.. Package Included 50mm cylinder body kits, cylinder head kits, A9 camshaft, camshaft seat kits, gaskets kits, oil pump and gear, spring sets, copper roller sets, 6pins racing AC CDI, ignition coil and racing 3-electrode spark plug.

Big bore kit for 4 stroke GY6 50 139qma and 139qmb engine. Your vehicle will get more power with this item,easier to climb hill than ever before. Inner Diameter of Cylinder bore 47mm,Outer Diameter of Piston Pin 13mm. Upgrade your engine from 50cc to 80cc. 12 months warranty guaranteed, please feel free to message us via Amazon system email for any concern.

Supplied as shown including 1x Cylinder Block 1x Piston 1x Complete Ring Set 2x Cirq clips 1x Piston Pin 2x Head Gasket Set 2x Valve Oil Seal. Diameter 47mm 53.2mm. Change the size of your engine, and feel the POWER.. Give your machine the new power and torque it really deserves, and have more fun with the power at your finger tips.. Big Bore mostly fitsGY6 or GY6 engine clone 139qmb Scooters, 50cc GY6 Go Kart engine, 50cc ATVs, 50cc Dune Buggies, 50cc Buggies.. Fits many models suchas YERFDOG, SUNL, SYM, PGO, KYMCO, VENTO, STRADA, ROKETA, FUJI, WILDFIRE, KAZUMA..

Upgraded Iron Bore Cylinder 40mm Intake Port 8mm Wider with Intake, Fits 66cc 80cc 2-Stroke Gas Motorized Bicycle Engine Kit.

Athena's Big Bore kit brings the raw power you have been missing in an easy to install, reliable package that bolts on with no machining needed in most cases, and includes easy-to-follow step-by-step installation instructions. Built from race proven designs to Kawasaki factory specifications. Podium-finisher with world-class teams across all forms of high-performance racing including super cross, motocross, GNCC, superbike, and more. Maximizes power and service life in Kawasaki Dirt Bikes and offroad vehicles. Fits the following rides Kawasaki KX 65 2002-2016.

1x Cylinder Block. 1x Piston. 1x Complete Ring Set. 2x Circlips. 1x Piston Pin. 2x Head Gasket Set.. Change from 50cc 39mm41.1mm to 80cc 47mm53.2mm. Works with stock Cylinder head..

1.Inner Diameter of Cylinder 47mm. 2.Outer Diameter of Piston Pin 13mm. 3.Easy installation, Upgrade your engine from 50cc to 80cc with more power. 4.Include Cylinder,Piston,Piston Ring,Piston Pin,Piston Pin Clip,Valve Oil Seal,Gaskets,Tensioner Gasket,Exhaust Gasket,IntakeExhaust Studs,Exhaust Nut. 5.Please contact us if you have any problem about our products, and we will offer you an satisfied solution.