Dr. Pulley
Dr. Pulley Yamaha Zuma & Vino 125 Performance Variator
Description
Stop leaving performance on the table with your stock variator. The Dr. Pulley Performance Variator is engineered specifically for Yamaha 125cc scooters, featuring optimized ramp angles that allow for a wider gear range and smoother, more aggressive shifting than the factory pulley. Whether you're navigating stop-and-go city traffic or chasing a higher top-end cruise, this variator delivers a noticeably quicker hole-shot and improved CVT efficiency — all in a direct bolt-on package.
Technical Performance Features
- Optimized Ramp Geometry: Designed to work seamlessly with Dr. Pulley 20x12 Sliding Weights to eliminate dead spots in your acceleration curve.
- High-Heat Dissipation: High-grade alloy construction reduces belt temperature, extending the life of your entire drivetrain.
- Precision-Machined Boss: Dedicated drive boss ensures a vacuum-tight fit, reducing vibration and parasitic drag at high RPMs.
- ISO 9001 Manufactured: Made in Taiwan to the highest global quality standards — durability that far exceeds standard aftermarket alternatives.
Technical Specifications
- Variator Outer Diameter: 118mm
- Bore (ID): 14mm
- Drive Face Spline Count: 20
- Weight: 2.0 lbs
Fitment Guide
Direct-fit performance upgrade for the Yamaha 125cc scooter family:
| Brand | Compatible Models |
|---|---|
| Yamaha | Zuma 125 (BWS), Vino 125, Cygnus 125 |
| Asia / Europe | Cygnus X 125 (Select Generations) |
Installation & Tuning Notes
- Sliding weights not included — choose your gram weight based on your performance objective. Pair with Dr. Pulley 20x12 Sliding Weights to take full advantage of the ramp geometry.
- For maximum gains, install an NCY Performance Exhaust at the same time to match your engine output to your new transmission speeds.
- Performance upgrades are considered racing parts intended for off-road/competition use. Check local laws regarding pollution-controlled vehicles. Not covered under warranty.
About Dr. Pulley
Dr. Pulley is a Taiwanese performance CVT specialist with decades of experience engineering variator components and sliding weights for scooters and small-displacement motorcycles. Their products are ISO 9001 certified and trusted by tuners and everyday riders worldwide as the benchmark upgrade for CVT-equipped scooters.
Product Diagrams
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
