The Namura FX-40032 Forged Standard Piston Kit is designed to provide dependable replacement performance for select Yamaha four-stroke off-road motorcycles. Built to standard bore specifications, this piston kit is suitable for restoring proper engine operation during a top-end rebuild or routine engine service. Its forged piston construction offers a strong, reliable foundation for demanding riding conditions.
This complete kit includes an individually wrapped Namura piston, a set of OEM-quality piston rings packed separately, an OEM-quality wrist pin, and cir-clips. Supplying the primary piston components together helps simplify installation and supports a consistent rebuild using matched parts from one kit. Always inspect the cylinder, connecting rod, and related components before installation and follow the motorcycle manufacturer’s service procedures.
Fitment includes the 2001–2004 Yamaha YZ250F and the 2001–2004 Yamaha WR250F, including the 2002, 2003, and 2004 WR250F models specifically listed for this application. Verify the model year and standard-bore application before ordering to ensure proper compatibility. The manufacturer part number is FX-40032, and the vendor part number is 184-F40032.
Features:
- Forged piston: Provides a durable replacement component for compatible Yamaha four-stroke engines.
- Standard-bore application: Designed for standard-size cylinder specifications on listed models.
- OEM-quality piston rings: Includes a matched ring set packed separately for organized installation.
- OEM-quality wrist pin: Supplied to support a complete and reliable piston replacement.
- Cir-clips included: Provides the retaining hardware needed for piston pin installation.
- Complete piston kit: Includes the piston, rings, wrist pin, and cir-clips in one package.
- Fitment: Fits 2001–2004 Yamaha YZ250F and 2001–2004 Yamaha WR250F models.
- Part numbers: Namura manufacturer part number FX-40032 and vendor part number 184-F40032.
Fitment:
2001 Yamaha WR250F
2001 Yamaha YZ250F
2002 Yamaha WR250F
2002 Yamaha YZ250F
2003 Yamaha WR250F
2003 Yamaha YZ250F
2004 Yamaha WR250F
2004 Yamaha YZ250F