2-Stroke Cylinder Head - Stock Cylinder Head Kit

Stock Cylinder Head Kit

• California Prop 65 Warning: Cancer and Reproductive Harm - https://www.p65warnings.ca.gov/
• UPC: 714205033618

The Cylinder Works Stock Cylinder Head Kit is a direct replacement for the standard bore cylinder head on the 2005-2021 Yamaha YZ 125. It features a competition valve job, C630 (nickel/aluminum/bronze) valve seats and guides, and shortened valve guides to accommodate higher lift cams. The combustion chamber is unshrouded, and the bowl is blended for improved performance while retaining stock-shaped ports. The kit includes cam caps and cam cap bolts but does not come with valves, springs, or lifters.