Polini Performance Variator Kit | Piaggio 4T 50cc

Upgrade the CVT on your Piaggio 4T 50cc scooter with the Polini Performance Variator Kit — widely regarded as the benchmark performance variator for modern Vespa and Piaggio 4-stroke 50cc platforms. The larger variator pulley diameter allows higher top speed with the correct roller weights, while the included blue +30% torque spring sharpens clutch engagement for improved acceleration. Works excellently in conjunction with the Malossi 80cc Big Bore Kit.

For off-road and closed-course competition use only. Not intended for use on public roads or land. Not legal for use in California on pollution-controlled vehicles. Performance upgrades are not covered under warranty.

Kit Contents

• Variator drive face with 6 roller weight channels (Polini branded)
• Polished aluminum movable face / ramp plate
• 3 blue plastic slider guides
• Variator boss sleeve
• 3 clutch return springs
• Blue +30% torque spring
• Rubber O-ring and steel washer
• Roller weights: 19x15.5mm, 4.7g (set of 6)

Technical Specifications

• Roller Weight Size: 19 x 15.5mm
• Roller Weight: 4.7g
• Torque Spring: +30% (blue)
• Polini Part Number: 241.674
• Made in Italy
• SKU: 146-17

Compatibility

• Piaggio Fly 50 (4T)
• Vespa LX 50 (4T)
• Vespa S 50 (4T)

California Prop 65 Warning: www.p65warnings.ca.gov

• Larger variator pulley diameter for higher top speed with correct roller weights
• Blue +30% torque spring for sharper clutch engagement and improved acceleration
• Complete kit: variator, ramp plate, slider guides, boss sleeve, springs, O-ring, and washer
• 4.7g 19x15.5mm roller weights included for optimized shift curve on stock 50cc engines
• Made in Italy by Polini — benchmark performance variator for Piaggio 4T 50cc platforms

Roller Size: 19x15.5mm | Roller Weight: 4.7g | Torque Spring: +30% (blue) | Polini P/N: 241.674 | Made in Italy | SKU: 146-17

Piaggio Fly 50 (4T); Vespa LX 50 (4T); Vespa S 50 (4T)