The Namura NA-10003-2 High-Compression Piston Kit is designed for select Honda sport ATV applications requiring a 85.47 mm replacement piston with an 11:1 compression ratio. This kit is intended for performance-oriented engine rebuilds and uses a high-compression piston design to help restore dependable operation and support responsive engine performance when properly installed.
This Namura piston kit fits the 2012, 2013, and 2014 Honda TRX400X, as well as the 1999 through 2005 Honda TRX400EX Sportrax. Verify the existing bore, piston specifications, and engine configuration before ordering to ensure proper application. The kit is not compatible with OEM piston rings, and its rings will not work with an OEM piston; use the matching components supplied or specified for this Namura piston assembly.
Brand: Namura
Manufacturer Part Number: NA-10003-2
Vendor Part Number: NA-10003-2
Size: 85.47 mm piston
Model: High-compression 11:1 piston kit
Fitment: 2012-2014 Honda TRX400X; 1999-2005 Honda TRX400EX Sportrax
Features:
- High-compression piston kit with an 11:1 compression ratio
- 85.47 mm replacement piston size
- Designed for select Honda TRX400X and TRX400EX Sportrax applications
- Namura manufacturer part number NA-10003-2
- Will not accept OEM rings, and the included rings will not work with an OEM piston
- Verify engine specifications and fitment before installation
Fitment:
1996 Honda XR400R
1997 Honda XR400R
1998 Honda XR400R
1999 Honda TRX400EX Sportrax
1999 Honda XR400R
2000 Honda TRX400EX Sportrax
2000 Honda XR400R
2001 Honda TRX400EX Sportrax
2001 Honda XR400R
2002 Honda TRX400EX Sportrax
2002 Honda XR400R
2003 Honda TRX400EX Sportrax
2003 Honda XR400R
2004 Honda TRX400EX Sportrax
2004 Honda XR400R
2005 Honda TRX400EX Sportrax
2006 Honda TRX400EX Sportrax
2007 Honda TRX400EX Sportrax
2008 Honda TRX400EX Sportrax
2009 Honda TRX400X
2012 Honda TRX400X
2013 Honda TRX400X
2014 Honda TRX400X