HOT CAMS Camshaft Exhaust Stage 1 Yamaha WR / YZ 400-426cc 98-02

Features:

• Stage 1 is designed for low end torque
• Adds a 5%-10% power gain
• Designed and dyno proven in the USA
• Manufactured by utilizing state of the art valvetrain software
• CNC machined from 8620 billet, case-hardened steel for an exact fit and lobe profile
• Engineered to be drop-in cams, that use stock valve springs (unless otherwise noted).
• Select cams feature Hot Cams Improved Throttle Design (ITR) technology; these cams improve throttle response throughout the entire rpm range while providing excellent power gains through the mid-range and top-end.
• For dual cam engine.
• Mid range increase, improved throttle response, and smooth power delivery compared to OEM. Includes auto-decompression mechanism. Exhaust Valve Lash: 0.200 mm.

Fit the models: