Prima Roller Weight Set - 20x12mm for Yamaha Zuma & Vino 125

Dial in your scooter's CVT performance with Prima 20x12mm Precision Roller Weights. The weight of your rollers determines when your variator "shifts" — swapping them lets you prioritize off-the-line snap or highway cruising efficiency. Manufactured to strict tolerances for balanced rotation and smooth variator movement. Available in 9g through 15g; 6 weights per set. SKU: ROLL20X12. Weight Selection Guide Light weights (9g–10g): Best for quick acceleration, stop-and-go city riding, and improved hill climbing. May reduce top-end speed slightly. Heavy weights (12g–15g): Ideal for long-distance commuting and maximizing top-end speed by keeping engine RPMs lower at high velocity. Durable composite shell: High-heat resistant outer shell reduces flat-spotting and extends variator service intervals. Tuning tip: Riders over 200 lbs or with a stock motor generally see the best results with lighter weights. If you have installed a big bore kit (BBK), heavier weights are often required to keep the engine from over-revving past its new power band. Compatibility Direct fit for 125cc+ Yamaha and European scooter platforms. Most 125cc models use 6 rollers per set. Brand Compatible Models Yamaha Zuma 125 (all years), Vino 125, SMAX 155, Majesty 125, BWS 125 Linhai / BMS Linhai 250/260/300, BMS 250, various 250cc touring scooters Specifications Dimensions: 20mm diameter x 12mm width Quantity: 6 weights per set Available weights: 9g, 10g, 11g, 12g, 13g, 14g, 15g Fitment type: OEM replacement / performance upgrade SKU: ROLL20X12 California Prop 65 Warning: www.p65warnings.ca.gov