NCY 2000 RPM Contra Spring - Zuma 50 2T & Minarelli

Keep your CVT working in the power range your performance build needs with the NCY 2000 RPM Compression / Contra Spring for Yamaha Zuma 50 2T and compatible horizontal Minarelli two-stroke engines. This red spring acts on the rear driven pulley, helping maintain belt pressure and resisting upshift so the engine can hold revs longer under load. It is a transmission-tuning component, not one of the small springs that control clutch-shoe engagement.

Key Features

• 2000 RPM Tuning Rating: Higher-resistance option for performance CVT setups.
• Rear-Pulley Belt Pressure: Helps the driven pulley maintain pressure on the drive belt.
• Upshift Control: Resists the move to a taller transmission ratio, helping keep the engine in its useful power range.
• Red Finish: Easily identifiable red coil spring.
• Minarelli Applications: Sized for the compatible horizontal two-stroke platforms below.

Technical Specifications

• Brand: NCY
• Part number: 1200-1013
• Manufacturer part number: 660A09OG20
• Component: Rear driven-pulley compression / contra spring
• Tuning rating: 2000 RPM
• Wire diameter: 4.0 mm
• Inner diameter: 44.0 mm
• Length: 108.0 mm
• Color: Red
• Country of origin: Taiwan

Compatibility

• Yamaha Zuma 50cc two-stroke
• Chicago Scooter Company (CSC) Bella Classic 50
• CSC Go
• CSC Go Max
• CSC Nitro Sport 50
• CSC Pug 50
• Other compatible scooters using horizontal Minarelli two-stroke engines

Match the spring's 44 mm inner diameter, 108 mm length and rear-pulley spring seats before ordering. Tune contra-spring resistance together with variator weights and the rest of your CVT setup. The 2000 RPM designation is a tuning rating, not a guaranteed clutch-engagement speed or fixed RPM increase. Fitment is for the two-stroke applications above, not Zuma four-stroke EFI models.

This product is intended for off-road use only. This product is not intended for use on public roads or land. Performance upgrades are considered racing parts and are not covered by warranty.

• 2000 RPM-rated rear driven-pulley contra spring for CVT tuning
• Helps maintain drive-belt pressure at the rear pulley
• Resists upshift to help hold engine revs under load
• Red coil spring; 4 mm wire, 44 mm ID and 108 mm length
• Compatible Yamaha Zuma 50 2T and horizontal Minarelli applications
• Made in Taiwan; off-road performance part not covered by warranty

Brand: NCY; Part number: 1200-1013; Manufacturer part number: 660A09OG20; Component: rear driven-pulley compression/contra spring; Tuning rating: 2000 RPM; Wire diameter: 4.0 mm; Inner diameter: 44.0 mm; Length: 108.0 mm; Color: red; Country of origin: Taiwan; Application: compatible horizontal Minarelli two-stroke CVTs; Off-road only; Performance upgrades not covered by warranty

Yamaha Zuma 50cc 2T; Chicago Scooter Company Bella Classic 50, Go, Go Max, Nitro Sport 50 and Pug 50; other compatible horizontal Minarelli two-stroke scooters; confirm 44 mm spring ID, 108 mm length and rear-pulley spring-seat fit; excludes Zuma four-stroke EFI applications