Piston and Rings for the 44mm diameter piston used in the 49cc engines found in most pocket bikes, gas scooters, mini-quads and other bikes that use the same style engines.

Specifications:
Piston
Diameter: 44mm
Overall Height: 41mm
Wrist Pin Diameter: 12mm
Rings
Diameter: 44mm (compressed)

Fits bikes with this 49cc engine

And fits bikes with this 49cc engine

Note: (Wrist pin, Bearing, and clips are NOT Included). Piston and rings come in two sizes, 43cc-47cc/40mm or 49cc/44mm. Wrist pin size also comes in two sizes 10mm or 12mm.  Please measure your piston diameter and wrist pin size before purchasing.