Wiseco Piston Kit with Gaskets for Yamaha YZ250 - 66.40 mm (PK1573)

Upgrade the top end of your Yamaha YZ250 with the Wiseco PK1573 Piston Kit with Gaskets. This complete engine kit is designed to provide the essential piston components and sealing materials needed for a reliable piston replacement, including a Wiseco piston, compatible rings, wrist pin, circlips, and a top-end gasket kit. It is an integrated solution for rebuilding or refreshing the engine’s top end with components engineered to work together.
The Wiseco PK1573 kit uses a 66.40 mm piston and is intended for applicable Yamaha YZ250 applications. For proper fitment and performance, verify the motorcycle model, year, bore requirements, and engine specifications before installation. Cylinder sleeves are not included and must be purchased separately if required for the rebuild.
Wiseco pistons must be fitted only with Wiseco rings. Wiseco ring types are not interchangeable, so the correct ring type must be used with the piston in this kit; for example, CD rings cannot be substituted for LC rings. Follow the manufacturer’s installation procedures, confirm all clearances, and use the supplied gaskets as specified during assembly. The Wiseco brand and PK1573 part number provide a clear reference when ordering replacement components or matching service parts for the Yamaha YZ250.

Features:

• Complete Kit: Includes a piston, compatible rings, wrist pin, circlips, and top-end gasket kit for one complete engine

• Application: Designed for applicable Yamaha YZ250 models

• Piston Size: Features a 66.40 mm Wiseco piston

• Ring Compatibility: Must be used with Wiseco rings; Wiseco ring types are not interchangeable

• Cylinder Sleeves: Must be purchased separately when required for the engine rebuild

Ships from Parts Unlimited.