Dr. Pulley Performance Variator for Yamaha Zuma 125 / Vino 125

Dr. Pulley Performance Variator for Yamaha Zuma 125 / Vino 125. The variator and its roller weights control how your scooter's automatic transmission shifts, which sets acceleration and top speed. Built to fit Yamaha Zuma. Shop more Yamaha Zuma Parts and Scooter Variators & Roller Weights.

Worn, flat-spotted rollers cause sluggish take-off and a lower top speed. Lighter rollers improve acceleration, heavier rollers raise cruising speed; match the roller diameter x width (for example 16x13mm) to your variator.

Product details

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:

• Assembled drive face (fan-fin cooling vanes)
• Fixed sheave (fan-fin face)
• Movable sheave with sliding weight ramps and tan plastic guides
• Steel boss/spacer tube
• 2 O-rings

Note: Sliding weights are not included. Pair with Dr. Pulley 20x12 Sliding Weights to take full advantage of the ramp geometry.

Key Features:

• Optimized ramp geometry — designed specifically for the Yamaha 125cc CVT platform
• Fan-fin cooling vanes on both sheaves for high-heat dissipation and extended belt life
• Precision-machined boss with vacuum-tight fit — reduces vibration and parasitic drag at high RPM
• 20-spline drive boss | 15-spline movable sheave bore | 118mm OD | 14mm ID
• ISO 9001 manufactured in Taiwan by Dr. Pulley
• For maximum gains, pair with an Performance Exhaust

Specifications:

• Brand: Dr. Pulley
• Variator outer diameter: 118mm
• Bore (ID): 14mm
• Drive boss splines: 20
• Movable sheave splines: 15
• Weight: 2.0 lbs
• ISO 9001 certified | Made in Taiwan

Compatibility:

• Yamaha: Zuma 125 (BWS)
• Yamaha: Vino 125
• Yamaha: Cygnus 125
• Asia / Europe: Cygnus X 125 (select generations)

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.

Specifications

• Fits: Yamaha Zuma
• Part type: Variators & Roller Weights
• Condition: New

Fitment check

Compare this part with your original before ordering: match the size, connector or part number, and the position on your scooter. Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm.

Shop more: Yamaha Zuma Parts · Scooter Variators & Roller Weights · Yamaha Scooter Parts · Scooter Parts