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 | BN161QMK-A | Other QMJ, QMK, and QMI models |
Don't see your engine listed? If the engine code includes "QM" or "FM", this product is compatible with your vehicle.
About Prima: Prima is the industry leader in premium scooter accessories, service parts and scooterist protective apparel. Prima brand products are designed direct-fit for all popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, Royal Alloy and GY6 / QMB powered scooters.