Hot Cams Performance Valve Spring Kit for 2001-2005 Yamaha YFM 660 R Raptor - SKYFM660S2

The Hot Cams Performance Valve Spring Kit SKYFM660S2 is designed for the Yamaha models listed below. It provides an application-specific valvetrain or timing-system component while keeping the product tied to the correct manufacturer part number.

This Hot Cams valve spring kit provides matched intake and exhaust spring components for the listed engine. The application-specific spring rates, installed heights, and maximum-lift capabilities are designed to support the compatible valvetrain setup.

Features

• Matched intake and exhaust valve-spring components
• Application-specific installed-height and lift specifications
• Designed for compatible Hot Cams or performance valvetrain configurations
• Valve-to-piston, coil-bind, retainer, and installed-height clearances must be verified

Specifications

• Brand: Hot Cams
• Product Type: Valve Spring Kit
• Maximum Valve Lift: 11.430 mm
• Installed Height: 30.607 mm
• Spring Rate: 270 lb/in
• Exhaust Installed Force: 55 lb
• Exhaust Open Force: 145 lb
• Related Camshafts: Hot Cams 4005-2 and 4050-3
• Manufacturer Part Number: SKYFM660S2

Vehicle Fitment

Compatible Make(s): Yamaha

• YFM 660 R Raptor (2001-2005)

Fitment Note: Confirm the exact year, model, engine, valve-train configuration, and required component quantity before ordering. Cam timing, valve lash, installed height, spring clearance, and related engine measurements must be verified during installation where applicable.