The Prima 15x12mm roller weight tuning kit gives you 36 color-coded rollers � 3 of each weight from 2g to 13g � to dial in your CVT transmission for your riding style, engine build, and rider weight. Designed for Yamaha Jog/Zuma/Vino/C3 50cc 2-stroke engines and Minarelli clone motors (QMB139 horizontal). Made in Taiwan. SKU: 1400-1083.
For stock roller weight reference, see our roller weight chart. Additional tuning tips on the MotoTec USA blog.
California Prop 65 Warning: www.p65warnings.ca.gov
