Dr. Pulley
Dr. Pulley 19x17mm Sliding Roller Weights - Vespa 150cc
Description
Dr. Pulley 19x17mm sliding roller weights for Vespa ET4 150, LX 150, LXV 150, S 150, and Piaggio Fly 150 (pre-3V) — all running the Piaggio Leader 150cc engine. Unlike round rollers that can develop flat spots and wedge in the variator ramps, Dr. Pulley’s patented non-round shape slides through the ramp. This allows the variator to open wider for higher top speed and retract further for stronger low-end acceleration — a broader range of gear ratios than any standard roller. Sold as a set of 6. Made in Taiwan by Dr. Pulley.
Key Features:
- Patented sliding shape — prevents the uneven wear and wedging common with round weights
- Broader gear ratio range — sits lower in the ramp for acceleration, pushes higher for top speed
- Self-lubricating low-friction nylon — reduces heat buildup and extends variator and belt life
- Available in 8.5g through 14g for precision tuning to your riding style and exhaust setup
- Fits OEM and most aftermarket variators for Piaggio Leader 150cc engines
- Sold as a set of 6 | Made in Taiwan by Dr. Pulley
Specifications:
- Brand: Dr. Pulley
- SKU: 1200-1110 (base) | Part no.: SR1917
- Size: 19mm x 17mm
- Quantity: Set of 6
- Material: High-density low-friction nylon
- Available weights: 8.5g, 9g, 9.5g, 10g, 10.5g, 11g, 11.5g, 12g, 12.5g, 13g, 14g
- Made in Taiwan
Compatibility — Piaggio Leader 150cc engine:
| Model | Engine |
|---|---|
| Vespa ET4 150 | Piaggio Leader (air-cooled) |
| Vespa LX 150 / LXV 150 | Piaggio Leader (carbureted & i.e.) |
| Vespa S 150 | Piaggio Leader (air-cooled) |
| Piaggio Fly 150 | Pre-3V engine models |
Installation notes:
- Orientation matters: Dr. Pulley sliders must be installed in the correct direction — installing them upside down can damage your variator.
- Weight tuning: Go 1–2 grams lighter than stock for more acceleration off the line; go heavier for higher top speed.
- While you’re in there: Check your variator slides — if they are loose or brittle, new weights won’t perform at full potential.
Product Diagrams
Features
Specifications
Size: 19mm x 17mm | Qty: Set of 6 | Material: High-density low-friction nylon | Weights: 8.5g–14g | SKU: 1200-1110 | Brand: Dr. Pulley
Model Fitments
Vespa ET4 150, Vespa LX 150, Vespa LXV 150, Vespa S 150, Piaggio Fly 150 (pre-3V) — Piaggio Leader 150cc engine
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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.
