Roller Weight Set 20x12mm for Yamaha Zuma, Vino 125

20x12mm Roller Weight Set for Yamaha Zuma and Vino 125

This set of roller weights measures 20x12mm and is made for Yamaha scooters. Changing the weight of the rollers adjusts your CVT behavior, affecting the point at which the variator shifts. It is one of the Yamaha Zuma scooter parts you can use to fine-tune acceleration and cruising efficiency. Several weights are offered, so you can match the set to how you ride.

Performance Tuning Options

Picking the correct weight makes a real difference to how your scooter feels. Lighter rollers (9g-10g) help with quick takeoffs, stop-and-go city riding, and climbing hills, though top speed may drop a little. Heavier rollers (12g-15g) are better suited to long trips, where they can deliver higher top speed while keeping engine RPM lower at highway pace.

Construction and Benefits

Each weight has a black composite outer shell that tolerates high temperatures and helps prevent flat spots. An aluminum bore insert sits inside to keep the variator moving smoothly. The weights are machined to tight tolerances so they spin in balance, which can help stretch the time between variator service.

Specifications

• Material: Composite outer shell, aluminum inner bore
• Size: 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
• Fits: Yamaha Zuma 125 (all years), Vino 125, SMAX 155, Majesty 125, BWS 125

Fitment

Fits:

• Yamaha Zuma 125 (all years)
• Yamaha Vino 125
• Yamaha SMAX 155
• Yamaha Majesty 125
• Yamaha BWS 125

How to choose: Stock motors and riders over 200 lbs do best with lighter weights (9g-10g). Heavier weights (12g-15g) are a good match for long commutes. If you run a big bore kit, go with 13g-15g.

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