Malossi Honda CN250 Performance Compression / Contra Spring

Eliminate sluggish acceleration and restore climbing power with the Malossi Yellow Compression Spring for the Honda CN250 Engine platform and equivalent Chinese clone motors. Engineered specifically for the 250cc liquid-cooled vertical engine, this performance contra spring increases rear pulley pressure to prevent belt slip under heavy load — keeping your engine in its optimal power band on steep inclines and during aggressive overtaking. Key Features Stiffer Sport Rate: Yellow "Sport" spring delivers faster downshift response when you roll on the throttle, eliminating the bog caused by a fatigued stock spring. Silicon-Steel Construction: High-tensile silicon steel with specialized heat treatment maintains tension even after extended high-heat operation. Smooth Shift Curve: Balances seat pressure and centrifugal force for a predictable, linear acceleration curve. Made in Italy: Precision-wound by Malossi to meet the exact mechanical requirements of the Honda 250cc drivetrain. Technical Specifications Color Code: Yellow (Sport / mid-range) Material: Silicon-steel alloy Application: CN250 liquid-cooled vertical engine Part Number: M 299975.Y0 Country of Origin: Italy Compatibility Model Engine Honda Helix CN250 All production years, liquid-cooled Honda Elite 250 CH250 Vertical engine models Chinese Clones CF250 Standard 250cc liquid-cooled vertical clones Installation Tips The Yellow spring is the ideal daily-riding choice — stiff enough to eliminate belt slip without causing excessive belt wear. Always use a clutch compression tool during installation; this spring is under significant tension. If your Helix bogs on hills, a fatigued stock spring is the most common cause — this is the fix. About Malossi Malossi has been synonymous with Italian performance engineering since 1930. Every product begins in R&D, undergoing rigorous testing in real racing conditions before being approved for street use. Components are manufactured robotically under the direct supervision of Malossi family artisans — a tradition of precision passed down through generations. California Prop 65 Warning: www.p65warnings.ca.gov Notice: This product is intended for off-road and racing use only. Not legal for use on pollution-controlled vehicles in California or on public roads. Check local laws before installing. Performance upgrades are not covered under warranty.