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CP
Pistons Yamaha YZ250F Piston Kits Standard Bore, YZ250F Big Bore and High Compression
YZ 250F Pistons
CP YZ250F Pistons for those that demand the
ultimate in engine performance!
High performance and racing Yamaha piston kits are available from CP
Pistons for all model years of the YZ250F four stroke dirt bikes. Standard bore size and
big bore YZ250F CP Pistons Yamaha dirt bike 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 dirt bike YZ250F racing pistons are
used by top professional riders and teams!
Standard Features included with each CP Yamaha YZ250F Piston Kit:
Standard series pistons have a "M" in the part number |
| 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 YZ 250 F Pistons
Project 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.
Project X series pistons have a "MX" in the part number |
| 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 |
Get HOLESHOT WINNING POWER with CP YZ 250F Piston Kits!
CP Yamaha YZ250F Piston Kit and
YZ250F Big Bore 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
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2001 - 2004 CP Yamaha YZ250F Piston Kit YZ250F Big Bore Piston Kits
Stock
Bore size is 77mm (3.031") Stock Stroke is 53.6mm (2.110") |
| Bore Size |
Disp. |
Comp |
Installation
Notes |
Piston/Gasket Kit
|
Piston Kit
|
Gasket Kit
|
| 77mm std. |
250 cc |
13.5-1 |
deglaze cylinder |
cpk1029c
|
cp m1029c
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cp c3057
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2005 - 2011 CP Pistons Yamaha YZ 250F Piston Kit YZF250 Big Bore Piston Kits
Stock Bore size is 77mm (3.031") Stock Stroke is 53.6mm
(2.110") |
| 77mm std. |
250 cc |
12.8-1 |
deglaze cylinder |
cpkx1032c |
cp mx1032c
|
cp c3057
|
| 77mm std. |
250 cc |
13.5-1 |
deglaze cylinder |
cpk1034c |
cp m1034c
|
cp c3057
|
| 77mm std. |
250 cc |
13.5-1 |
deglaze cylinder |
cpkx1034c
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cp mx1034c
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cp c3057
|
| 77mm std. |
250 cc |
14.0-1 |
deglaze cylinder |
cpk1035c
|
cp m1035c
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cp c3057
|
| 77mm std. |
250 cc |
14.0-1 |
deglaze cylinder |
cpkx1035c
|
cp mx1035c
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cp c3057
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| 79mm +2mm big bore |
263cc |
12.5-1 |
bore and replate cylinder |
cpk1036c |
cp m1036c
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cp c3057
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| 79mm +2mm big bore |
263cc |
12.5-1 |
bore and replate cylinder |
cpkx1036c
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cp mx1036c
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cp c3057
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| 80mm +3mm big bore |
269cc |
13.5-1 |
requires sleeve or cylinder |
cpkx1050c
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cp mx1050c
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cp c3059
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2005 - 2011 YZ250F FULL RACE Piston
Stock Bore size is 77mm (3.031") Stock Stroke is 53.6mm
(2.110")
Full race YZ250F pistons are custom forged
pistons but available off the shelf. These are single ring, high
compression, lightweight pistons which feature a highly efficient dome design that
maximizes squish
without compromising performance. Lateral gas ports are added to maximize ring seal while a skirt
coating is included to improve power and provide additional lubrication, minimizing friction in extreme
competition conditions.
The full race
pistons come complete with high performance rings, lightweight pins and locks. |
| 77mm std. |
250 cc |
14.25-1 |
deglaze cylinder |
cpkx1135c
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cp mx1135c
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cp c3057
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Project X YZ250F Platinum Racing Piston, Rod, Gasket Kits
Developed and proven in the 2009 AMA outdoor motocross season, these championship winning kits have once again changed the game. New for 2010, 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 Lock rings, 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
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2005 - 2011 Yamaha YZ250F Project X Platinum Professional Racing Kit
YZ250F Stock Bore size is 77mm (3.031") Stock Stroke is 53.6mm (2.110") |
| Bore Size |
Disp. |
Comp |
Installation
Notes |
Platinum Kit
|
Piston Kit
|
Gasket Kit
|
| 77mm std. |
250 cc |
13.5-1 |
deglaze cylinder, uses 1mm Smaller than stock pin and 2mm Longer than stock Rod; Lightweight |
cpkx1p34c |
cp mx1p34c |
cp c3057est |
| 77mm std. |
250 cc |
14-1 |
deglaze cylinder, uses 1mm Smaller than stock pin and 2mm Longer than stock Rod; Lightweight |
cpkx1p35c
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cp mx1p35c
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cp c3057est
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Carrillo YZ250F Connecting Rod Yamaha YZ250F Rod |
Premium Carrillo YZ250F connecting rod provides superior strength for extreme high performance and racing YZ 250F 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. |
2001 - 2011 YZ250F Connecting Rod
YA-25CA<-03681N
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Replacement Special Carrillo YZ250F Rod for use with CP Pistons Platinum Kit Piston |
| YZ250F Platinum rod, length and pin size to match the Platinum Pistons listed above. Works ONLY with the Project X Platinum pistons as this rod has a 1mm smaller than stock pin bore and is 2mm longer than a stock yz250f connecting rod |
2005 - 2011 YZ250F Project X Platinum Connecting Rod
YA-2515CA<-03761N
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The piston and gaskets listed on this page fit the
following model year YZ250F Dirt Bikes:
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 Yamaha YZ 250F Piston Kits and Gaskets
Back to Top YZ250F Pistons Page
© Motorsports Parts Corporation T/A Campbell Enterprises. All rights reserved
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