gy6 139qmb 80cc top speed

[565]

hi i have a gy6 139qmb 80cc big bore kit. the gears in my gear box have been changed. the primary has 14/53 teeth and the secondary has 51 teeth. top speed is 60-65km/h. What clutch springs and rollers can I use for top speed. I weigh 60-65 kg.

[FrankenMech]

Hmmm, You don't have a differential on a scoot. You may want to check out one of the videos here on CVT tuning.