- Big Bore Kit
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TRX400EX 400EX 400X XR400 87mm 87 416cc JE Cometic 10.81 Cylinder Big Bore Kit
Brand New 87mm 416cc Big Bore Top End Rebuild Kit. Fits Honda TRX400EX & TRX400X Years 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014. Also Fits Honda XR400 Years 1996 1997 1998 1999 2000 2001 2002 2003 2004. 10.8:1 JE piston Kit (Includes Rings, Pin & Clips). Athena Top End Gasket Kit.
This kit is compatible with all OEM components. The piston uses pump or race gas.