Cylinder Works 05-21 Yamaha YZ 125 125cc Standard Bore Cylinder Head

OEM-style cast aluminum replacement cylinder head comes complete with cam caps and bolts for an out-of-the-box, ready-to-go installation. The unshrouded combustion chamber is designed to improve airflow, featuring a blended bowl and competition-grade valve job.

• Shortened valve guides accept high lift cams for greater torque and enhanced power
• C630 nickel/aluminum valve seats and guides are easier on valve to reduce wear
• Valves, springs, retainers and lifters are sold separately
• Stock-shaped ports deliver high performance