The Namura NX-40026 piston kit is designed for select Yamaha two-stroke motorcycles requiring a 67.94 mm standard-bore piston. Featuring a ceramic-coated piston and a 10.6:1 compression ratio, this kit supports reliable engine performance and is suitable for replacement or engine rebuilding applications.
Developed for precise fitment, the kit is compatible with 1992–1997 Yamaha WR250 models and 1992–1995 Yamaha YZ250 models. Always verify the original piston specifications, cylinder condition, and manufacturer service information before installation to confirm compatibility.
Each Namura piston kit includes an individually wrapped piston, a set of OEM-quality piston rings packed in a separate box, an OEM-quality wrist pin, and circlips. These components provide the essential hardware needed for a proper piston replacement while helping simplify the rebuilding process. The manufacturer part number is NX-40026, and the vendor part number is 184-40026.
Features:
- Brand: Namura
- Manufacturer: Namura
- Manufacturer Part Number: NX-40026
- Vendor Part Number: 184-40026
- Piston Type: Ceramic-coated replacement piston
- Bore Size: 67.94 mm standard bore
- Compression Ratio: 10.6:1
- Included Components: Individually wrapped piston, OEM-quality rings, wrist pin, and circlips
- Fitment: 1992–1997 Yamaha WR250
- Fitment: 1992–1995 Yamaha YZ250
Fitment:
1992 Yamaha WR250
1992 Yamaha YZ250
1993 Yamaha WR250
1993 Yamaha YZ250
1994 Yamaha WR250
1994 Yamaha YZ250
1995 Yamaha WR250
1995 Yamaha YZ250
1996 Yamaha WR250
1996 Yamaha YZ250
1997 Yamaha WR250
1997 Yamaha YZ250
1998 Yamaha WR250
1998 Yamaha YZ250