Brand New 400EX 87mm 416cc Complete Big Bore Top End Kit

ADD POWER TO YOUR 400EX TOP END!!

Fits Honda TRX400EX and TRX400X

Years 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015



This kit includes:
  • NEW 87mm Cylinder
  • CP piston Kit With Wrist Pin & Clips (12.5:1 requires race gas)
  • Cometic Top End Gasket Kit
  • Kibblewhite Precision Heavy Duty Head Studs Kit

This kit is compatible with all OEM components, no machining required (direct bolt on).  The studs require no machining or modification to the cylinder.  The piston uses pump or race gas. All parts are warrantied

We ship worldwide & ship all domestic orders free!