Performance Parts and Racing Parts Campbell Enterprises

CP Pistons Yamaha YFZ 450 Piston Kits Standard Bore, High Compression YFZ450 Big Bore Pistons

Yamaha YFZ450 ATV CP Pistons Logo

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

High performance and racing Yamaha forged piston kits are available from CP Pistons for all model years of the YFZ450 four stroke ATV's. Standard bore size and big bore YFZ 450 CP Pistons Yamaha ATV 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. We also have high compression YFZ 450 piston kits available.

 

Yamaha yfz 450 atv cp pistons

Get Holeshot Winning Power with CP Pistons YFZ 450 Pistons!

Standard Features included with each Yamaha YFZ450 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

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, along with the individual piston kit info.

CP Pistons brand 2003 2004 2005 / 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 Yamaha YFZ450 Piston Kits YFZ 450 Pistons & Big Bore YFZ 450 Piston Kits

  • Piston/Gasket Kit Set includes: 1 Piston, 1 Piston Pin, Piston Rings, Pin Lock rings, 1 Top End Gasket Kit
  • Piston Kit includes: 1 Piston, 1Piston Pin, 1 set Piston Rings, Pin Lock rings for 1 cylinder
  • Gasket Kit Includes: Cometic high performance top end gaskets required to replace piston in 1 cylinder

The 2006 and newer engines use a slightly longer stroke crankshaft, which is why the engine ccs and compression listed below is different than for the 2004 - 05 YFZ450 engines.

  • Stock Bore size is 95mm (3.740")
  • Stock Stroke 2003 - 2005 is 62mm (2.440")
  • Stock Stroke 2006 - 2016 is 63.4mm (2.496")
Bore Size Disp. Comp Installation
Notes

Honda CRF 250 piston and top end gasket kit

Piston/Gasket Kit

Honda crf250r piston kit

Piston Kit

Honda CRF 250 R top end gasket kit

Gasket Kit
95mm std. 439cc
449cc
2003-2005 12.5-1
2006 - 2016 12.75-1
deglaze cylinder

cpk1000


Add To Cart

cp m1000


Add To Cart

cp c3066

$48.05 $43.25

Add To Cart

95mm std. 439cc
449cc
2003-2005 13.0-1
2006 - 2016 13.25-1
deglaze cylinder

cpk1001


Add To Cart

cp m1001


Add To Cart

cp c3066

$48.05 $43.25

Add To Cart

95mm std. 439cc
449cc
2003-2005 13.5-1
2006 - 2016 13.75-1
deglaze cylinder

cpk1002


Add To Cart

cp m1002


Add To Cart

cp c3066

$48.05 $43.25

Add To Cart

96mm +1mm big bore 449cc
459cc
2003-2005 13.0-1
2006 - 2016 13.25-1
bore and replate cylinder cpk1004


Add To Cart

cp m1004


Add To Cart

cp c3066

$48.05 $43.25

Add To Cart

96mm +1mm big bore 449cc
459cc
2003-2005 13.5-1
2006 - 2016 13.75-1
bore and replate cylinder cpk1005

Discontinued

cp m1005

Discontinued

cp c3066

$48.05 $43.25

Add To Cart

97mm +2mm big bore 458cc
468cc
2003-2005 12.5-1
2006 - 2016 12.75-1
bore and replate cylinder cpk1006


Add To Cart

cp m1006


Add To Cart

cp c3068

$49.95 $44.96

Add To Cart

97mm +2mm big bore 458cc
468cc
2003-2005 13.0-1
2006 - 2016 13.25-1
bore and replate cylinder cpk1007


Add To Cart

cp m1007


Add To Cart

cp c3068

$49.95 $44.96

Add To Cart

97mm +2mm big bore 458cc
468cc
2003-2005 13.5-1
2006 - 2016 13.75-1
bore and replate cylinder cpk1008


Add To Cart

cp m1008


Add To Cart

cp c3068

$49.95 $44.96

Add To Cart

98mm +3mm big bore 468cc
478cc
2003-2005 12.5-1
2006 - 2016 12.75-1
bore and replate cylinder cpk1009


Add To Cart

cp m1009


Add To Cart

cp c3068

$49.95 $44.96

Add To Cart

98mm +3mm big bore 468cc
478cc
2003-2005 13.5-1
2006 - 2016 13.75-1
bore and replate cylinder cpk1085

Add To Cart
cp m1085

Add To Cart

cp c3068

$49.95 $44.96

Add To Cart

 

2003 - 2005 / 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 Yamaha YFZ 450 ATV FULL RACE Pistons

Stock Bore is 95mm (3.740")
Stock Stroke 2003-2005 is 62mm (2.440")
Stock Stroke 2006 - 2016 is 63.4mm (2.496")

CP Full Race YFZ 450 piston kits are custom pistons with shelf stocking part availability. These single ring, high compression, lightweight pistons feature a highly efficient dome design that maximizes squish without compromising performance. Lateral gas ports are added to maximize ring seal while skirt coating provides additional lubrication, minimizing friction in extreme conditions.The Full Race YFZ450 piston kits come complete with high performance piston rings, lightweight pins and locks.

This piston is a Project X series FULL RACE piston which includes these additional features:

  • Leading edge racing piston technology
  • Coated Piston Skirts
  • New piston skirt designs maximize power and reduce piston rocking
  • Fully boxed style forging for ultimate strength, durability and power
  • Internal windows allow additional oil to flow to pin
  • Wrist pins treated with proprietary coating to eliminate pin galling

 

95mm std. 439cc
449cc
2003-2005 13.25-1
2006 - 2016 13.5-1
deglaze cylinder

cpkx1026


Add To Cart

cp mx1026


Add To Cart

cp c3066

$48.05 $43.25

Add To Cart

 

Project X Platinum Racing Piston, Rod, Gasket Kit for Yamaha YFZ 450

Developed 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.

  • Platinum Kit includes: Full Race Piston, Piston Pin, Piston Rings, Pin Locks, Carrillo Rod and Gasket Kit
  • Piston Kit includes: Full Race Piston, Piston Pin, Piston Rings, Pin Lock rings for 1 cylinder
  • Gasket Kit Includes: Cometic high performance top end gaskets required to replace piston and rod in 1 cylinder

 

2003 - 2016 Yamaha YFZ450 Project X Platinum Kit

Stock Bore size is 95mm (3.740")

Stock Stroke 2003 - 2005 is 62mm (2.440"), Stock Stroke 2006 - 2016 is 63.4mm (2.496")

Bore Size Disp. Comp Installation
Notes

Honda CRF 250 piston and top end gasket kit

Platinum Kit

Honda crf250r piston kit

Piston Kit

Honda CRF 250 R top end gasket kit

Gasket Kit
95mm std. 439cc
449cc
13.5-1 deglaze cylinder, 1mm Smaller Pin/ 3.5mm Longer Rod Lightweight cpkx1p26

Add To Cart
cp mx1p26

Add To Cart

cp c3066est

$79.95 $71.96

Add To Cart

 

Carrillo Yamaha YFZ450 Connecting Rod YFZ 450 Racing Rod

Honda CRF 250 Carrillo Connecting Rod Carrillo CRF250R connecting rod image

Premium Carrillo YFZ 450 connecting rod provides superior strength for extreme high performance and racing Yamaha YFZ450 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 YFZ 450 connecting rod as well as for high performance and racing engines, including big bore engines.

2003 - 2005

YA-YFZCA-2<-04035N

$272.85 $253.75

Add To Cart

2006 - 2007

YA-YFZCA-2<-03996N

$272.85 $253.75

Add To Cart

2008 - 2016

YA-YF08CA-2<-03996N

$272.85 $253.75

Add To Cart

 

 

Cylinder Works YFZ 450 Big Bore Kits

CRF 250R Big Bore Kit

Cylinder Works YFZ450 Big Bore Kit features and included parts:

  • New cylinder, honed to size for easy piston installation
  • Piston kit
  • Gasket kit
  • Virtually Identical in appearance to stock
  • Just purchase and install no additional machine work required
  • Fits 2004 - 2010 models

 

Bore Size
Disp.
Model
Years

crf250r big bore kit

Complete YFZ 450 Big Bore Kit

Cylinder Works replacement piston

Replacement YFZ450 Big Bore Piston

replacement gasket kit

YFZ450 Big Bore Top End Gasket Kit

replacement piston rings

Big Bore YFZ450 Piston Ring Set

98mm +3mm big bore 478cc 2004-2011 cw 21001-k01 Cylinder works has discontinued the +3mm kit, replacement piston, gaskets and rings are still available cw 21001-p01 cw 21001-g01 cw 21001-r01

 


 

Wiseco YFZ450 Pistons, Piston Kits, Top End Gasket Kits and Complete Big Bore Kits with Cylinders

 

Wiseco YFZ 450 Pistons and YFZ450 Big Bore Kits

 

Wiseco 2004 2005 / 2006 2007 2008 2009 2010 2011 Yamaha YFZ 450 Pistons

 

List of what is included with the different Wiseco part numbers listed below.

Piston:

  • Piston with coated skirts
  • Piston Pin
  • Piston Rings
  • Pin Locks

Top end " PK " kit:

  • Piston with coated skirts
  • Piston Pin
  • Piston Rings
  • Pin Locks
  • Top End Gasket Kit

Big bore " CK " kit:

  • Piston with coated skirts
  • Piston Pin
  • Piston Rings
  • Pin Locks
  • Top End Gasket Kit
  • Cylinder

Gasket kit:

 

  • Complete premium top end gasket set.
  • Includes cylinder base gasket, head gasket, o-rings, seals, etc.
  • Exact contents vary based on engine

The 2006 and newer engines use a slightly longer stroke crankshaft, which is why the engine ccs and compression listed below is different than for the 2004 - 05 YFZ450 engines.

  • Stock Bore size is 95mm (3.740")
  • Stock Stroke 2003 - 2005 is 62mm (2.440")
  • Stock Stroke 2006 2007 2008 2009 2010 2011 is 63.4mm (2.496")
  • We can provide cylinder bore and replate work, please contact us for assistance

 

Bore Size ccs Compression Installation
Notes
Piston Top End Kit / Big Bore Kit Gasket Kit
95mm std. 439cc
449cc
2003-2005 12-1
2006 - 2016 12.25-1
deglaze cylinder

Wiseco 4865M09500

$188.24 $169.42

Add To Cart

Wiseco PK1071

$249.08 $224.17

Add To Cart

Wiseco W6129

$97.39 $87.65

Add To Cart

95mm std. 439cc
449cc
2003-2005 13-1
2006 - 2016 13.25-1
deglaze cylinder

Wiseco 4835M09500

$231.38 $208.24

Add To Cart

Wiseco PK1064

$328.77 $295.89

Add To Cart

Wiseco W6129

$97.39 $87.65

Add To Cart

96mm +1mm big bore 449cc
459cc
2003-2005 12-1
2006 - 2016 12.25-1
bore and replate cylinder

Wiseco 4865M09600

$188.24 $169.42

Add To Cart

Wiseco PK1072

$267.92 $241.13

Add To Cart

Wiseco W6248

$60.84 $54.76

Add To Cart

96mm +1mm big bore 449cc
459cc
2003-2005 13-1
2006 - 2016 13.25-1
bore and replate cylinder

Wiseco 4835M09600

$254.51 $229.06

Add To Cart

Wiseco PK1065

$315.35 $283.82

Add To Cart

Wiseco W6248

$60.84 $54.76

Add To Cart

98mm +3mm big bore 468cc
478cc
2003-2005 12-1
2006 - 2016 12.25-1
bore and replate cylinder
or purchase CK kit which
includes new cylinder

Wiseco 4906M09800

$253.41 $228.07

Add To Cart

Wiseco CK189

$1054.89 $949.40

Add To Cart

This is a complete big bore kit which includes a new cylinder

Wiseco W6414

$95.05 $85.55

Add To Cart


Wiseco RACE ONLY YFZ450 2003 - 2005 / 2006-2007-2008 2009 2010 2011 2012 Piston

This kit includes

Wiseco Full Race YFZ450 piston kits are custom pistons with shelf stocking part availability. These single ring, high compression, lightweight pistons feature a highly efficient dome design that maximizes squish without compromising performance. Lateral gas ports are added to maximize ring seal while skirt coating provides additional lubrication, minimizing friction in extreme conditions.The Full Race YFZ450 piston kits come complete with high performance piston rings, lightweight pins and locks.

 

95mm std. 439cc
449cc
2004-2005 13.75-1
2006 - 2016 14-1
deglaze cylinder

Wiseco 4929M09500

$281.98 $253.78

Add To Cart

not available

Wiseco W6129

$97.39 $87.65

Add To Cart

 

 

The piston and gaskets listed on this page fit the following model year Yamaha YFZ450 ATV Race Quad:

2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 YFZ 450

 

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