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CP Pistons Kawasaki KLX400 Dirt Bike Piston Kits Standard Bore, Big Bore and High Compression Piston

CP Pistons, the best pistons for those that demand the ultimate in engine performance!

KLX400 high performance and racing forged piston kits are available here for the KLX400 off road dirt bikes. Standard bore size and big bore 434cc and 450cc KLX400 CP Pistons Kawasaki kits and high compression KLX 400 piston kits are all available here. 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 2003 - 2006 Kawasaki KLX400 Piston Kits Stock Standard Bore size is 90mm (3.543") Stock Stroke is 62.4mm (2.464") 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, along with the individual piston kit info.
Part #	Bore Size	Size	Compression	Top End Gasket Kit #	Installation Notes	Piston Kit Price
cp m4028	90mm std.	398 cc	12.5-1	e-mail us	deglaze cylinder	$229.75
cp m3003	+4mm 94mm big bore	434cc	12.5-1	cp c7806	bore and replate	$229.75
cp m3004	+5mm 95mm big bore	450 cc	12.5-1	cp c7980	bore and replate	$229.75
Installation Notes: Deglaze Cylinder When replacing a piston with the same stock bore size as the original factory stock size you do not need to have your cylinder modified. We do recommend that you deglaze the cylinder. This involves running a hone through the cylinder to remove glazing and provide the best possible surface for piston ring seal. This will improve power and piston and ring life. Bore and Replate Cylinder When installing an oversize, big bore piston, the cylinder must be bored to the correct new bore size to allow installation of your oversize piston. The cylinder then must be re-plated and finish honed to provide the proper surface for your piston and rings to work in, and provide best power and longevity.
Kit Contents Standard Features included in Kawasaki KLX400 CP Piston Kit: Piston Double forced pin oilers Fully CNC machined Piston Pin Accumulator groove Pin lock removal grooves Piston Rings Anti detonation grooves X-style forging Pin retaining locks Light weight piston pin Balanced to + or - 1 gram

FULL RACE upgraded model piston shown in pictures.

CP Pistons racing pistons are used by top professional riders and teams including:

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Motocross Quad ATV and Dirt Bike Books

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The piston and gaskets listed on this page fit the following model year Kawasaki KLX400 Dirt Bike:

2003 2004 2005 2006 KLX400