Kibblewhite 80-80030 Valve Spring Kit for Yamaha YFM660 Raptor 2001-2008

The Kibblewhite 80-80030 is a premium valve spring kit engineered specifically for the Yamaha YFM660 Raptor (2001-2008). This kit features KPMI valve springs wound from premium Kobe Super-Clean Chrome Silicon Wire, designed to deliver maximum performance and durability in demanding ATV applications.

Key Features:

• Precision-wound from premium Kobe Super-Clean Chrome Silicon Wire for superior strength
• Heat-treated, stress relieved, and shot peened to ensure maximum performance and service life
• Engineered using advanced spring design simulation and analysis software
• Optimized for cam and spring harmonics, stress reduction, mass, and operating RPM
• Direct fit for Yamaha YFM660 Raptor models from 2001 to 2008
• Required when upgrading to KPMI Black Diamond valves

This valve spring kit is designed to maintain consistent valve control and prevent valve float in high-performance applications. The premium materials and precision manufacturing ensure reliable operation across the entire RPM range, making it an ideal upgrade for both stock and modified engines.

Important Installation Note: For this application, ensure the tappet never contacts the retainer. The top surface of the shim must never fall below the top surface of the retainer during installation and operation.