The Namura NA-50003-6 Two-Stroke Piston Kit is designed for select Polaris 300 applications requiring a 75.97 mm +1.50 mm piston. This performance replacement piston kit features an 11:1 compression ratio and is intended for dependable engine rebuilding and restoration. The kit is manufactured by Namura and is identified by manufacturer part number NA-50003-6 and vendor part number NA-50003-6.
This Namura piston kit fits 1996–1999 Polaris Xpress 300 models, 1994–1995 Polaris 300 2X4 models, 1994–1995 Polaris 300 4X4 models, and 1996–1997 Polaris Xplorer 300 4X4 models. Verify the existing cylinder bore, piston specifications, and application before installation to ensure proper fit and engine compatibility.
Important: This piston kit will not accept OEM rings, and the included or compatible rings will not work with an OEM piston. Use the correct Namura ring set with this piston and follow the manufacturer’s installation, clearance, and break-in recommendations. Professional installation is recommended for accurate measurement and reliable two-stroke engine performance.
Features:
- Brand: Namura
- Manufacturer: Namura
- Manufacturer Part Number: NA-50003-6
- Vendor Part Number: NA-50003-6
- Piston Size: 75.97 mm, equivalent to approximately 2.991 inches
- Oversize: +1.50 mm, equivalent to approximately +0.059 inch
- Engine Type: Two-stroke
- Compression Ratio: 11:1
- Fitment: 1996–1999 Polaris Xpress 300
- Fitment: 1994–1995 Polaris 300 2X4
- Fitment: 1994–1995 Polaris 300 4X4
- Fitment: 1996–1997 Polaris Xplorer 300 4X4
- Ring Compatibility: Will not accept OEM rings, and the rings will not work on an OEM piston
Fitment:
1994 Polaris 300 2X4
1994 Polaris 300 4X4
1995 Polaris 300 2X4
1995 Polaris 300 4X4
1996 Polaris Xplorer 300 4X4
1996 Polaris Xpress 300
1997 Polaris Xplorer 300 4X4
1997 Polaris Xpress 300
1998 Polaris Xplorer 300 4X4
1998 Polaris Xpress 300
1999 Polaris Xplorer 300 4X4
1999 Polaris Xpress 300