Yamaha YZ450f 102mm Piston Kit for 500cc Big Bore Kits +2023 Engines

This is a custom piston designed for the 2023 and newer YZ450f engines. It is 102mm bore to work with our 500cc Big Bore kits. It has a 14.5:1 compression ratio, light weight design with under head milling to create the lightest piston possible. The valve pockets are designed to work with bigger valves and cams. The rings are optimized with a lower friction design to free up power and give clearance for longer stroked crankshafts.

These pistons combined with our cylinder kits make huge power to wake up the YZ450f.