Wiseco CSK031 Clutch Spring Kit YZ125 / 660R Raptor

The Wiseco CSK031 Clutch Spring Kit is a direct-replacement clutch spring set engineered for high-performance riding. Each spring is manufactured from premium steel and then subjected to a shot-peening and heat-treatment process that increases fatigue resistance and extends service life under repeated compression cycles.

Key Features:

• Made from premium-grade steel for long-lasting durability
• Shot-peened construction reduces surface stress and improves spring longevity
• Heat-treated for consistent performance under high-load conditions
• Stiffer spring rate ensures positive, reliable clutch lockup on every engagement
• Prevents clutch slip during hard acceleration and aggressive riding
• Direct OEM-replacement fitment for straightforward installation

Wiseco clutch springs are a reliable upgrade or replacement for riders who demand consistent clutch performance. Whether you're racing or trail riding, the CSK031 kit helps maintain firm, predictable clutch engagement and reduces the power loss associated with worn or fatigued OEM springs.