Prima Roller Weight Tuning Kit (20x12) big bore kit tool 150 and 170i scooters and

150 and 170i scooters and 125/150cc GY6 bikes

Replacement rings can be ordered here

In clear or smoke

1 - 58364 Grommet

Prima Roller Weight Tuning Kit (20x12) big bore kit tool 150 and 170i scooters andThis 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