The Prima Roller Weight Tuning Kit (15x12, 2g-13g) is the best way to tune the CVT transmission in a Yamaha Jog or Zuma 50cc engine, as well as many Minarelli clone motors noted below.
Specifications:
- Includes 3 of each roller in sizes ranging from 2g to 13g, for a total of 36 weights.
- Combining 2 sets of rollers allows you to tune your engine with a large variance in weight. For example, using the set of 10-gram rollers and the set of 12-gram rollers, alternating weights in variator results in an 11-gram roller set. Using the set of 10-gram rollers and the set of 11-gram rollers, alternating weights in variator, results in a 10.5-gram roller set.
- Lighter weights increase RPMs for a given road speed, while heavier weights lower RPMs for a given road speed.
- Tailor your tuning to match your engine setup and personal driving style.
Compatibility:
| Yamaha Zuma 50 2-Stroke | Yamaha Jog 50 |
| Yamaha Vino 50 | Yamaha C3 |
| Minarelli Clone engines | 1E40EQMB Engines |
| 1E41QMB Engines | 1PE40QMB Engines |
*DANGER: Weights must be installed in a 120-degree pattern! If not, SEVERE ENGINE DAMAGE WILL RESULT!!!
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.
Made in Taiwan.