RDLN High-Speed Gear Set (17/49) – GY6 50cc / 139QMB Parts for Scooters we've got you covered with

we've got you covered with rings and pistons

Bore: 40mm (stock 50cc)

Engine type: Single Cylinder 4-Stroke

Model: CP546200

RDLN High-Speed Gear Set (17/49) – GY6 50cc / 139QMB Parts for Scooters we've got you covered withUnlock Top End Speed: RDLN 17 49 Performance Gear Set Is your 50cc100cc 139QMB engine revving at its limit without providing a higher top speed? The RDLN Performance Gear Set (17 49) is engineered to change your final drive ratio, allowing your engine to push the bike faster at lower RPMs. Depending on your current engine modifications and rider weight, this gear set can net an increase of up to 7+ MPH in top end velocity. Performance & Engineering