Piston Kit - 39mm - 50cc Horizontal Engine Brake pads are included

Brake pads are included

This carburetor is the replacement part for many Chinese GY6 50cc scooters

Other sizes will not interchange with drive sprockets

then you most likely need to replace the voltage regulator

Piston Kit - 39mm - 50cc Horizontal Engine Brake pads are includedChinese 39mm Piston Kit for 50cc ATVs, Dirt Bikes and Go Karts. This Chinese 39mm piston kit is the replacement part for many 4 stroke Chinese atvs, dirt bikes and go karts. Does not fit GY6 engines. Piston kits ship complete with piston, piston rings, piston pin and piston clips. Piston kit description: Piston Height: 36mm (1. 417 in) Piston Diameter: 39mm (1. 535 in) Piston Pin Length: 31mm (1. 22 in) Piston Pin Diameter: 13mm (0. 51 in) Set of 5