Brand new high-performance replacement cylinder head for Yamaha YZ125 (2005–2021). Precision-engineered for serious riders and racers, this head includes premium components and advanced machining for improved durability and flow. Built to handle high-lift cams and racing conditions, while maintaining stock port shapes for compatibility and reliability.

Features:

• Includes cam caps and cam cap bolts for a complete installation
• Fitted with C630 nickel/aluminum/bronze valve seats and guides
• Competition valve job performed for improved performance
• Shortened valve guides to accept higher lift camshafts
• Unshrouded combustion chamber and blended bowl-to-port seat for optimized flow
• Stock-shaped intake and exhaust ports
• Made in the U.S.A. with premium materials and precision engineering