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.

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

• Precision-manufactured to strict tolerances for balanced rotation
• High-heat resistant composite shell reduces flat-spotting
• Extends variator service intervals
• Available in 9g through 15g for full CVT tuning range
• 6 weights per set — direct OEM replacement or performance upgrade
• Fits 20mm diameter x 12mm width variator housings

Dimensions: 20mm diameter x 12mm width | Quantity: 6 per set | Available weights: 9g, 10g, 11g, 12g, 13g, 14g, 15g | Fitment: OEM replacement / performance upgrade | SKU: ROLL20X12

Yamaha Zuma 125 (all years) | Yamaha Vino 125 | Yamaha SMAX 155 | Yamaha Majesty 125 | Yamaha BWS 125 | Linhai 250 | Linhai 260 | Linhai 300 | BMS 250