Wiseco CSK034 Clutch Spring Kit for YZ/WR250F 2001-2007

The Wiseco CSK034 Clutch Spring Kit is a direct-replacement clutch spring set engineered for competition-level reliability. Each spring in the kit is manufactured from premium steel and subjected to a rigorous shot-peening and heat-treatment process that enhances fatigue resistance and extends service life under high-load, high-cycle clutch use.

Key Features:

• Premium steel construction for durability under demanding riding conditions
• Shot-peened finish improves surface strength and resistance to stress fatigue
• Heat-treated for consistent spring rate retention over time
• Stiffer-than-stock spring rate ensures positive, slip-free clutch lockup
• Direct replacement fit — no modification required
• Sold as a complete spring kit

Worn or fatigued clutch springs are a common cause of clutch slip, inconsistent engagement, and power loss under hard acceleration. The Wiseco CSK034 restores firm, predictable clutch feel and prevents slippage, making it an ideal upgrade during any clutch rebuild or routine maintenance interval.