Universal Parts GY6 Cylinder and Head Kit 6-Tooth Sprocket The A12 works even better

The A12 works even better when paired with a performance head (larger valves)

"description": "Standard starters often struggle to turn over engines with increased displacement

While it shares the same high-performance design as the factory original (Genuine #C21510010004)

Silver steel tubing

Genuine Buddy 50 Genuine RoughHouse 50 Genuine RoughHouse 50 Sport Genuine Rattler 50 Genuine Rattler 110 Genuine Black Cat 50 50cc 2t Minarelli engines

Universal Parts GY6 Cylinder and Head Kit 6-Tooth Sprocket The A12 works even betterUniversal Parts Cylinder and Head Kit for 150cc GY6 4 stroke engines. Includes cylinder, piston, pin, circlips, rings, head gasket, base gasket and chain tensioner gasket. Please choose from 57. 4mm bore or 61mm bore from the drop down menu. *You may need to modify your engine case to accommodate the larger cylinder. Please Note: 61mm kit does NOT fit 161QMK 200cc engines! Bore: 57. 4mm or 61mm, choose in the drop down menu. Overall Height: 90mm