Top 8 GY6 Big Bore Kit – Powersports Cylinder Heads

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1. TRKIMAL

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Complete GY6 Cylinder Head Rebuild Kits with valves, Trkimal 57.4mm 150cc Big Bore Upgrade Kits for 4 stroke 157QMJ Engines Chinese scooter moped parts, GY6 Engine parts Sunl Roketa Peace JCL

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TRKIMAL #ad - Cylinder bore: 57. 4mm / non-eGR Cylinder. Apply to: gy6 4 stroke 150cc engine for most of chinese scooter, atv and go karts. Parts included:gy6 150cc cylinder head comp, belt 835*18*30, a7tc spark plug, set of 14 gram roller, oil pump assy with driving gear, piston, valve seals, full set of engine gasket, ignition coil, 57.

4mm bore cylinder block, rocker arms, 6pins cdi, spring, set of intake manifold and Muffler Bolts, and Exhaust locking ha, Camshaft chain 90, DC regulator, Starter clutch, Chain adjuster, Rings and Wrist Pin, Camshaft, Set of 57.44mm piston assy, relay, Oil screen, cover and oil seal, intake mani. Full sets of parts: complete parts is suitable for motorcycle maintenance shop, motorcycle parts supermarket and personal use with nice price.
BrandTRKIMAL #ad
ManufacturerTRKIMAL #ad
Weight11 Pounds
Part NumberTRKIMAL-00045-1

2. AH

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AH GY6 180cc Cylinder Head Kit Assy 61mm Big Bore with 69mm Valves for 152QMI 157QMJ Scooter Moped ATV Go Kart Quad

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AH #ad - Fit gy6 180cc 4 strokes 152qmi 157QMJ Engine Scooter Moped. Cylinder head:intake valve od 26mm;Exhaust Valve OD 23mm;Combustion Chamber Diameter-61mm. Cylinder body:bore 61mm;piston Diameter 61mm; Piston Pin Diameter 15mm ;.
BrandAH #ad
ManufacturerAH #ad
Part NumberHDTG

3. TRKIMAL

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Racing Performance CDI Ignition Coil Spark Plug Clutch etc, GY6 Cylinder Rebuild Kits Trkimal Upgrade 50mm Big Bore Kit Cylinder head assemble 69mm valve sets for 49CC 50CC 139QMB Moped Scooter Engine

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TRKIMAL #ad - With cylinder body kits, cylinder head kits, gaskets kits, copper roller sets, camshaft, oil pump and gear, camshaft seat kits, 6pins racing AC CDI, spring sets, ignition coil and racing 3-electrode spark plug.69mm valve length version. Upgrades parts kits for most of 50cc scooter. This big cylinder kit will upgrade your gy6 50cc 60cc 80cc to 100cc, without EGR, to get more RPM, more power, faster maximum speed. Simple Installation.
BrandTRKIMAL #ad
ManufacturerTRKIMAL #ad
Weight6.6 Pounds
Part NumberTRKIMAL-00192-1

4. GOOFIT

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GOOFIT Performance Big Bore Cylinder Kit GY6 80cc 47mm for 139QMB ATV Scooter Moped Go Kart

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GOOFIT #ad - Easy installation with video instruction, you can visit the video on our Facebook homepage and Youtube. Include cylinder, piston, valve oil seal, exhaust Gasket, Piston Ring, tensioner Gasket, Intake&Exhaust Studs, piston pin clip, gaskets, Piston Pin, Exhaust Nut. Inner diameter of cylinder: 47mm, Outer Diameter of Piston Pin: 13mm. High performance upgrade 47mm cylinder Rebuild Kit for GY6 49cc 50cc 60cc 80cc engine. One week money back guarantee if not satisfied.
BrandGOOFIT #ad
ManufacturerGOOFIT #ad
Weight0.11 Pounds
Part NumberGroup-11-B-X
ModelGroup-11-B

5. ARJ

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47mm Big Bore Cylinder Piston Rings Gasket Kit for GY6 49cc to 80cc Scooter Moped ATV Go Kart 139QMB 139QMA Engine

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ARJ #ad - Compatible with: fit for gy6 49cc 50cc 60cc 80cc 4 Stroke Scooter Moped ATV Go Kart. Inner diameter of cylinder: 47mm, Outer Diameter of Piston Pin: 13mm. Suitable: for models with 139QMB or 139QMA engine. Package included:1 x cylinder block, 2 x head gasket, 2 x circlip, 2 x valve seal, 1 x piston pin, 1 x piston ring set include 4 rings, 1 x piston, 1 x intake gasket.
BrandARJ #ad
ManufacturerARJ #ad
Part Number47MM

6. CLEO

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AH 61mm Big Bore Cylinder Kit With Piston Ring Pin For 4 Strokes GY6 180cc 152QMI 157QMJ Engine Scooter ATV Go Kart Taotao Baja Roketa

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CLEO #ad - Bottom hole distance: 63mm Center hole distance: 55mm. Fits: gy6 180cc 61mm big bore 4 Strokes Scooter Moped ATV Engine. Includes cylinder body, Bore 61mm. Piston diameter:61mm Piston Pin Diameter:15mm. Includes piston kit and Top end gasket set.
BrandCLEO #ad
ManufacturerAH #ad
Part Numbercylinder-007

7. Chanoc

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Chanoc 80cc Big Bore 47mm Cylinder Rebuild Kit for GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB

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Chanoc #ad - Your vehicle will get more power with this item, easier to climb hill than ever before. Upgrade your engine from 50cc to 80cc. Big bore kit for 4 stroke GY6 50 139qma and 139qmb engine. Inner diameter of cylinder bore: 47mm, Outer Diameter of Piston Pin: 13mm. Please feel free to message us via Amazon system email for any concern.
BrandChanoc #ad
ManufacturerChanoc #ad
Part NumberBG50-GY80

8. TRKIMAL

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GY6 Engine parts for Chinese Scooter64mm Valve Length, GY6 Cylinder Rebuild Kits Trkimal 47mm 80cc Big Bore Upgrade Kits for 49cc 50cc 139QMB Engines 64mm Valve scooter moped parts

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TRKIMAL #ad - Apply to: gy6 4 stroke 49cc 50cc 60cc 80cc engine upgrade for most of chinese scooter, atv and go karts. Fit toroketa, kymco, carroll stream eagle, taotao, kazuma, sunl, Baja, Redcat Tank Giovanni Wildfire Xtreme Seaseng Qlink Yiben Jonway Jmstar, Panterra, Vento.

Cylinder bore: 47mm / Non-EGR Cylinder. Valve length: 64mm. Parts included:gy6 80cc cylinder head with 64mm valve, and exhaust locking ha, ignition coil, 4pin ac regulator, valve seals, belt 699*18*30, chain adjuster, set of 47mm Piston Assy, cover and oil seal, Set of 8.55 gram roller, camshaft, rocker arms, set of intake manifold and muffler bolts, a7tc spark plug, 47mm bore Cylinder Block, Camshaft chain 82, 6pins CDI, Rings and Wrist Pin, Piston, Oil Pump Assy with Driving Gear, Oil screen, Full Set of Engine Gasket, spring, relay, Starter clutch.
BrandTRKIMAL #ad
ManufacturerTRKIMAL #ad
Part NumberTRKIMAL-00039-1