
The Cylinder Works Power Valve Kit, part number CW-PV-K01, is a precision-machined replacement power-valve assembly for maintaining the exhaust-valve system on the listed Yamaha YZ250. It is intended for Yamaha YZ250; see the complete vehicle list below.
Make: Yamaha
Fitment and Installation Note: Confirm the complete year, make, model, engine configuration, and manufacturer part number before ordering. Engine assembly should follow the vehicle manufacturer’s specifications, clearances, torque values, and break-in procedures.