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

Precision CVT Tuning: Prima 20x12mm Roller Weight Set

Dial in your scooter's performance with Prima Precision Roller Weights. The weight of your rollers determines when your CVT "shifts" gears—changing these allows you to prioritize off-the-line snap or highway cruising efficiency. These 20x12mm rollers are manufactured to strict tolerances to ensure balanced rotation and smooth variator movement.

Performance Profiles

• Light Weights (e.g., 9g-10g): Best for quick acceleration, stop-and-go city riding, and improved hill climbing. Note: This may reduce top-end speed a bit.
• Heavy Weights (e.g., 12g-14g): Ideal for long-distance commuting and maximizing top-end speed by keeping engine RPMs lower at high velocity.
• Durable Composite: High-heat resistant outer shell designed to reduce "flat-spotting" and extend the service interval of your variator.

Complete Model Fitment Guide

These 20x12mm weights are a direct fit for 125cc+ Yamaha and European scooter platforms. Note: Most 125cc models use 6 rollers per set.

Technical Specifications

• Dimensions: 20mm (Diameter) x 12mm (Width)
• Quantity: 6 Weights per set
• Fitment Type: OEM Replacement / Performance Upgrade
• SKU: ROLL20X12

Pro Tuning Tip: If you are a rider over 200lbs or have a stock motor, you will generally see the best results by leaning toward 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.

For maximum longevity, we recommend applying a light coating of high-temp variator grease to the roller ramps during installation.