Prima Roller Weight Tuning Kit (20x12) big bore kit tool this pipe delivers a noticeable

this pipe delivers a noticeable bump in mid-range and top-end power while giving your Buddy a deeper

In clear or smoke

Bore: 40mm (stock 50cc)

1 - 58364 Grommet

Polini has stood unparalleled in the racing and tuning scene

Prima Roller Weight Tuning Kit (20x12) big bore kit tool this pipe delivers a noticeableThis is probably the best way to go about tuning your CVT transmission! Included in this tuning kit are 12 sets of 3 rollers, for a total of 36 roller weights. These sets range from 7g to 18g. Combining 2 sets of rollers allows you to tune with a large variance of weights sets! For example: 3x 10g & 3x 11g rollers (alternating weights in variator) gives you 10. 5g roller set. DANGER: weights must be put in a 120 deg pattern! If not, SEVERE ENGINE