25×15 Inch Sliding Roller Weight System

Description

The gear ratio in scooter transmissions is changed by the inward & outward rolling movement of the roller weights. This size of 25×15 sliding roller weights is compatible with larger sized scooters, including several models from Yamaha.
With the innovative Dr. Pulley sliders, the roller weights ?Ç£slide?Ç¥ in and out in the Movable Drive Pulley (MDF) to change/extend the gear ratio.
Lighter roller weights = faster take-off acceleration, lower top speed.
Heavier roller weights = slower take-off acceleration, higher top speed.

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