Dr. Pulley performance variator kit for Yamaha 125cc scooters, including the Zuma 125 (BWS), Vino 125, and Cygnus 125. Optimized ramp angles deliver a wider gear range and smoother, more aggressive shifting than stock. Precision-machined fan-fin cooling vanes on both sheaves reduce belt temperature and extend drivetrain life. Kit includes assembled drive face, fixed sheave, movable sheave with sliding weight ramps and guides, steel boss/spacer, and two O-rings. ISO 9001 manufactured in Taiwan. Sliding weights sold separately.
Kit Contents:
Note: Sliding weights are not included. Pair with Dr. Pulley 20x12 Sliding Weights to take full advantage of the ramp geometry.
Key Features:
Specifications:
Compatibility:
Off-road / competition use only. Performance upgrades are racing parts not intended for use on pollution-controlled vehicles. Check local laws before installing. Not covered under warranty.
