Honda CRF450R piston kits, high compression, big bore and stock standard bore high performance and racing piston kits are available from CP Pistons for all model years of the CRF450R four stroke dirt bikes. We offer the complete CP Pistons Honda CRF450 R product line. These superior 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. Buy the Best CRF 450 pistons, buy CP.
The following sizes of CP Pistons Honda CRF450R big bore kits are available, 458cc, 468cc, 477cc and 486cc.
Standard Features included with each Honda CRF450R CP Piston Kit:Standard series pistons have a "M" in the part number |
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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 |
Additional Features for "Project X" Series CRF 450R PistonsProject X Series pistons are the result of the latest in ultra high performance technology improvements from CP. Pistons listed below with "MX" preceding the part number are part of the new "Project X" piston line up. Piston and gasket kits with a "CPKX" preceding the part number include a Project X series piston in the kit. Project X series pistons and top end kits all have a "X" in the part number |
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Leading edge racing piston technology | Fully boxed style forging for ultimate strength, durability and power |
Coated Piston Skirts | Internal windows allow additional oil to flow to pin |
New piston skirt designs maximize power and reduce piston rocking | Wrist pins treated with proprietary coating to eliminate pin galling |
Honda CRF 450R Project X Platinum Racing Piston, Carrillo Connecting Rod and Cometic Gasket KitsDeveloped and proven in the 2009 AMA outdoor motocross season, these championship winning kits have once again changed the game. Project X Platinum Kits feature the same top of the line products that top professionals rely on. The redesigned piston and rod combo gives your engine a lightweight assembly that is engineered to give you more power and durability. Revolutionary to the industry, these types of assemblies were once only available as custom pieces at custom prices. Now, off the shelf and available, these kits are just the thing you need to transform your bike into a racing machine without breaking the bank.
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2002 - 2008 Honda CRF450R Project X Platinum KitStock Bore size is 96mm (3.780") Stock Stroke is 62mm (2.441") |
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Bore Size | Disp. | Comp | Installation Notes |
Platinum Kit |
Piston Kit |
Gasket Kit |
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96mm std. | 449 cc | 13.5-1 | deglaze cylinder, 1mm Smaller Pin/ 3mm Longer Rod Lightweight | cp kx2p10
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cp mx2p10
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C3047est
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2009 - 2014 Honda CRF 450R Project X Platinum KitStock Bore size is 96mm (3.780") Stock Stroke is 62mm (2.441") |
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96mm std. | 449 cc | 14.0-1 | deglaze cylinder, 1mm Smaller Pin/ .5mm Longer Rod Lightweight | cp kx2p63
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cp mx2p63
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C3270est
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Carrillo Honda CRF 450 Connecting Rod CRF450R Rod |
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![]() Premium Carrillo CRF 450R connecting rod provides superior strength for extreme high performance and racing CRF450 engines. Designed with legendary Carrillo quality to give you an extremely strong and dependable replacement connecting rod at a reasonable price. Can be used as a stock replacement connecting rod as well as for high performance and racing engines, including big bore engines. |
2002 - 2008 CRF 450R Connecting Rod HO-45CA-2<-04156N
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2009 - 2014 CRF450R Connecting Rod HO-4509CA-2<-04016N
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Replacement Special Carrillo CRF450R Connecting Rod for CP Pistons Platinum Kit |
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The CRF 450 connecting rods listed in this row are for use ONLY with the CP Platinum series pistons. | 2002 - 2008 CRF450 CP Platinum Kit Rod HO-4518CA<-04274N
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2009 - 2014 CRF 450 CP Platinum Kit Rod HO-450918CA<-04036N
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Cylinder Works NEW CRF450R Standard Bore and CRF 450 Big Bore CylindersCylinder Works convenient drop in four stroke CRF 450 cylinders take the hassle and the time out of sending in your worn or damaged cylinders for honing and re-plating. All Cylinder Works cylinders are brand new and both standard bore and big bore sizes look virtually identical to stock OEM cylinders. They are nickel silicon carbide plated for long life and they are precision honed to exact size for easy piston installation. When you purchase a Cylinder Works cylinder there is no core charge or exchange. You receive a brand new, ready to install cylinder. This big bore cylinder is designed as a true "drop in" with no extra machine work required to your engine or cases. |
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95mm standard | 450cc | 2004 - 2009 | cw 20001 |
98mm +3mm oversize big bore | 478cc | 2004 - 2009 | cw 21001 |
Cylinder Works CRF 450 Big Bore KitsCylinder Works CRF450 Big Bore Kit features and included parts:
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Model Years |
Complete CRF 450 Big Bore Kit |
Replacement CRF450 Big Bore Piston |
CRF450 Big Bore Top End Gasket Kit |
Big Bore CRF450 Piston Ring Set |
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98mm +3mm big bore | 478cc | 2004-09 | cw 21001-k01 | cw 21001-p01 | cw 21001-g01 | cw 21001-r01 |
The CP pistons and gaskets listed on this page fit the following model year CRF450 R Dirt bike engines:
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Honda CRF450R Piston Kit
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