High performance and racing Honda piston kits are available from CP Pistons for all model years of the XR400R four stroke dirt bikes. Standard bore size and big bore XR400 CP Pistons Honda dirt bike kits are all available here as well as high compression pistons.. These forged pistons will work with oversize valves as well as high lift camshafts as they include oversize valve reliefs. They incorporate a "X" style forging for greater strength, durability and reduced weight. Along with the full radius dome designs, high performance piston rings and lightweight piston pins, these pistons offer the highest quality and are engineered for maximum power output.
CP Pistons racing pistons are used by top professional riders and teams
|Standard Features included with each Honda XR 400R CP Piston Kit:|
|Double forced pin oilers||Fully CNC Machined|
|Accumulator groove||Pick lock removal grooves|
|Anti detonation grooves||X-style forging|
|Light weight pins||Balanced to + or - 1 gram|
Each of the below kits
Cometic top end gasket sets are available separately, but are not included with the piston kit. The matching top end gasket kit for each application is listed in the table below, when available, along with the individual piston kit info.
Click on the part number in the table below for pricing or to order the piston and, or head gasket of your choice.
|1996 - 2009 Honda XR400R CP Piston Kit
Stock Bore size is 85mm (3.346") Stock Stroke is 70mm (2.755")
|Part #||Bore Size||Cubic
|Compression||Top End Gasket Kit #||Installation
|cp m2003xr||85mm std.||397 cc||11-1||cp c7825xr||deglaze cylinder|
|cp m2004xr||85mm std.||397 cc||12.5-1||cp c7825xr||deglaze cylinder|
|cp m2005xr||86mm +1mm oversize||407cc||11-1||cp c7825xr||bore and hone|
|cp m2006xr||86mm +1mm oversize||407cc||12.5-1||cp c7825xr||bore and hone|
|cp m2007xr||87mm +2mm oversize||416cc||11-1||cp c7826xr||bore and hone|
|cp m2008xr||87mm +2mm oversize||416cc||12.5-1||cp c7826xr||bore and hone|
|cp m2033xr||89mm +4mm oversize||435cc||11.5-1||cp c7826xr||bore and hone|
The piston and gaskets listed on this page fit the following model year XR400 Dirt Bikes:
1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Honda XR400 Piston Kit