Prima Roller Weight Tuning Kit (15x12)

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 Engi