Secondary Clutch Spring (140-220) // SKU: 05-140-220

Secondary Clutch Spring (140-220) // SKU: 05-140-220

Optimize backshift response and prevent power-robbing belt slippage under heavy load with the Bikeman Performance 140-220 Secondary Clutch Spring. While primary springs govern engagement and upshift force, the secondary driven spring controls belt pinch and backshift—determining how quickly your machine shifts back into its peak powerband when cycling the throttle through deep powder, trail turns, or steep climbs.

Featuring a 140 lb initial load and a 220 lb finish load, this driven spring profile provides firm side-pressure against the secondary sheaves to lock the belt in place and eliminate friction heat. Its balanced finish rate allows for smooth, continuous upshifting while enabling the helix to react instantly to changes in track load and terrain resistance.

Key Performance Features

• 140-220 Driven Spring Rate: 140 lb initial rate delivers rapid backshift response; 220 lb finish rate provides balanced resistance against the helix during full shift-out.

• Lightning-Fast Backshift: Rapidly downshifts the secondary clutch when letting off the gas, putting immediate engine RPM and track speed back on tap the moment you hit the throttle.

• Eliminates Belt Slippage & Heat: Maintains high side-pressure on driven sheaves, preventing belt slippage, reducing under-hood heat, and extending drive belt life.

• High-Tensile Alloy Steel: Precision-wound spring steel resists heat-induced sag and rate loss, maintaining consistent performance through severe operating conditions.

• Essential Tuning Component: Seamlessly pairs with Bikeman custom-cut helixes and SNYPR adjustable weights to tailor shift profiles to specific tracks and modifications.

Product Specifications

• SKU: 05-140-220

• Initial Load: 140 lbs

• Finish Load: 220 lbs

• Component Type: Secondary Driven Clutch Spring

• Primary Function: Controls driven clutch backshift speed, sheave side-pressure (belt clamp), and upshift resistance