NCY Compression Spring (1500RPM) Most Minarelli,Yamaha 50 2T

NCY 1500rpm clutch compression spring (contra spring) for, Yamaha Zuma 50cc 2T and most 2T 50cc horizontal Minarelli engines.
Compression/contra springs do a couple of things. First, they supply the pressure to engage the belt. They also determine the rate at which the CVT transmission changes from low to high gear. A 1000rpm spring will go into a higher gear sooner than a 2000rpm spring.

Specifications:
• 1500 RPM Compression Spring
• Wire Diameter: 4mm
• Inner Diameter: 44mm
• Length: 108.0mm

Compatibility: Models below and other bikes using horizontal 2T Minarelli engines
• CSC Bella Classic 50
• CSC Go
• CSC Go Max
• CSC Nitro Sport 50
• CSC Pug 50
• Yamaha Zuma 50cc 2T

About NCY: NCY stands as the premier provider of aftermarket performance components for leading scooter brands such as Honda, Yamaha, Genuine, Vespa, Piaggio, SYM, Lance, KYMCO, and GY6/QMB powered scooters. Established in 1997, NCY adheres to rigorous quality standards and holds ISO 9001 certification.
NCY performance parts are made in Taiwan.

*Performance upgrades are considered racing parts and are not covered by warranty.

• 1500 RPM spring rate — stiffer than stock to raise engagement RPM and hold power band higher before upshifting
• Faster backshifting — forces lower gear ratios faster when decelerating into turns or climbing hills
• Eliminates belt slip — additional side pressure on rear pulley sheaves prevents slippage under higher-horsepower builds
• Drop-in replacement for stock Minarelli / Yamaha 50cc 2T rear clutch torque spring assemblies
• ISO 9001 certified, manufactured in Taiwan by NCY

Spring Rating: 1500 RPM | Application: Rear Clutch / Torque Driver Assembly | Engine: Minarelli 50cc 2-stroke (horizontal & vertical) | Engine Codes: 1E40QMB, 1PE40QMB, 3KJ, 4VP, 5AU | MPN: 660A09JOG15 | Origin: Taiwan

Fits 2-stroke 50cc scooters with Minarelli-style engines (horizontal & vertical, short-case and long-case). Compatible with Yamaha Zuma 50 (2T), Jog 50, Vino 50 (2T), BW's 50; Genuine Buddy 50, Roughhouse 50, Rattler 50; Aprilia SR 50 (Minarelli 2T), Rally 50, Scarabeo 50 (2T); CPI Oliver/Hussar/Aragon 50; Keeway Fact/Matrix/Hurricane 50; Malaguti F12/F15; Adly Bullseye/Jet/Thunderbike 50; Vento Triton/Zip 50. Will NOT fit 4-stroke GY6 (139QMB) engines.