Prima Roller Weight Tuning Kit (18x14, 6g to 17g)

This Prima Roller Weight Tuning Kit is the best way to dial in the CVT transmission on your Genuine Buddy or 157QMJ GY6 engine to suit your driving style. Specifications: 12 sets of 3 rollers (36 total) 18x14 rollers Weights from 6g to 17g Combining 2 sets of rollers lets you tune your transmission to suit your driving style (lighter weights = higher RPMs, heavier weights = lower RPMs) For example, using 3x 10g and 3x 11g rollers (alternating weights in variator) gives you 10.5g roller set. DANGER: Weights must be installed in an alternating pattern (120 degree angle). Otherwise, YOU WILL SEVERELY DAMAGE YOUR ENGINE! Compatibility: This product works with the bikes listed below and engines with the following engine codes. Genuine Blur 150 Genuine Buddy 125 Genuine Buddy 150 Genuine Buddy 170 SYM Fiddle 125   157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes: 157QMJ 161QMK 152QMI 1P61QMK YN1P57QMJ 1P52FMI 154FMI JJ157QMJ 1P57QMJ BN157QMJ BN16