QMB139 50mm Big Bore Cylinder Kit, Engines and Engine parts : QMB139 PS151-258

Item No: PS151-258

Brand: ZPS

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50mm Big Bore Cylinder Kit for 50cc 4-stroke QMB139 engines. Upgrades to 81.3cc based on a stock stroke of 41.4mm! Includes cylinder, piston, pin, circlips, rings, head gasket and base gasket.

*You may need to modify your engine case to accommodate the larger cylinder.

Upgrades to 81.3cc!
Bore: 50mm
Overall Height: 70mm
Cylinder Sleeve Outer Diameter: 54.4mm

QMB139 50mm Big Bore Cylinder Kit

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150/300 TrailMaster, Kandi, IceBear, Kinroad, Hammerhead, Roketa
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70, 110, 125, 150, 250cc SSR, Apollo, PitsterPro, Thumpstar, Roketa
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Manco, Kenbar, Kartco, Yerf-Dog, Carter, Azusa, TopKart
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GOKART/MINIBIKE PARTS	FACTORY PARTS	PERFORMANCE
PARTS	TRAILMASTER	BUGGY PARTS

ENGINES	TRAILMASTER 150 ENGINE	150 BUGGY
TORQUE CONVERTER	KINROAD	150 ENGINE
GOKART SPEED	TRAILMASTER 300	150 TRANSMISSION
MINIBIKE SPEED	HAMMERHEAD	250 BUGGY
TIRES	BUGGY TIRES	ALL TIRES
WHEELS	BUGGY WHEELS	ALL WHEELS
ATV PARTS	DIRT BIKE PARTS	SCOOTER PARTS
ATV PARTS	PIT BIKE 70/110/125/250	SCOOTER PARTS
ATV TIRES	HONDA CRF50/70	50 SCOOTER
ATV WHEELS	PIT BIKE ENGINES	150 SCOOTER
CHINESE BIKE PARTS	HONDA CLONE PARTS	MINI CHOPPER PARTS
POCKET BIKE -33,36,49cc	TITAN TX200	LITTLE BADASS
GY6 50/125/150	PREDATOR 212	150 SCOOTER
DIRT BIKE 50/70/110/125	HONDA GX200	150 SCOOTER