Restore dependable engine performance with the Namura NA-50003-2 piston kit for select Polaris 300 two-stroke applications. This piston kit features a 74.97 mm bore size and an 11:1 compression ratio, making it suitable for properly prepared replacement or rebuilt engines requiring a +0.50 mm oversize piston. The kit is designed for compatible Polaris models from the mid-to-late 1990s.
Fitment includes the 1996–1999 Polaris Xpress 300, 1994–1995 Polaris 300 2X4, 1994–1995 Polaris 300 4X4, and 1996–1997 Polaris Xplorer 300 4X4. Always verify the cylinder bore, piston clearance, and engine specifications before installation to ensure the correct oversize piston is selected. Professional installation and machining practices are recommended for reliable results.
Important: This Namura piston kit will not accept OEM piston rings, and the included or compatible rings will not work with an OEM piston. Use the correct ring set matched to this piston kit and confirm all components before assembly. The manufacturer part number is NA-50003-2, and the vendor part number is 187-500032.
Features:
- Bore Size: 74.97 mm (+0.50 mm oversize)
- Compression Ratio: 11:1
- Engine Type: Two-stroke
- Brand: Namura
- Manufacturer Part Number: NA-50003-2
- Vendor Part Number: 187-500032
- 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
- Compatibility Note: Will not accept OEM rings, and the rings will not work with 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