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CP Pistons Yamaha YFZ 450 Piston Kits Standard Bore, High
Compression YFZ 450 Big Bore Pistons
Fits 2004 2005 2006 2007 2008 2009 YFZ 450 models
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.
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 2004 2005 / 2006 2007 2008 2009 Yamaha YFZ450 Piston Kits YFZ 450 Pistons & Big Bore YFZ 450 Piston Kits
Each of the below pistons
include:
- Piston
- Piston Pin
- Piston Rings
- Pin Locks
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 2004 - 2005 is 62mm (2.440")
-
Stock Stroke 2006-2007-2008 2009 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 Gasket Kit |
| 95mm std. |
439cc
449cc |
2004-2005 12.5-1
2006 - 2009 12.75-1 |
deglaze cylinder |
cp
m1000
$229.75
 |
|
cp c7479
$49.95
|
|
| 95mm std. |
439cc
449cc |
2004-2005 13.0-1
2006 - 2009 13.25-1 |
deglaze cylinder |
cp m1001
$229.75
|
|
cp c7479
$49.95
|
|
| 95mm std. |
439cc
449cc |
2004-2005 13.5-1
2006 - 2009 13.75-1 |
deglaze cylinder |
cp m1002
$229.75
|
|
cp c7479
$49.95
|
|
| 96mm +1mm big bore |
449cc
459cc |
2004-2005 13.0-1
2006 - 2009 13.25-1 |
bore and replate cylinder |
cp m1004
$229.75
|
|
cp c7479
$49.95
|
|
| 96mm +1mm big bore |
449cc
459cc |
2004-2005 13.5-1
2006 - 2009 13.75-1 |
bore and replate cylinder |
cp m1005
$229.75
|
|
cp c7479
$49.95
|
|
| 97mm +2mm big bore |
458cc
468cc |
2004-2005 12.5-1
2006 - 2009 12.75-1 |
bore and replate cylinder |
cp m1006
$229.75
|
|
cp c7502
$49.95
|
|
| 97mm +2mm big bore |
458cc
468cc |
2004-2005 13.0-1
2006 - 2009 13.25-1 |
bore and replate cylinder |
cp m1007
$229.75
|
|
cp c7502
$49.95
|
|
| 97mm +2mm big bore |
458cc
468cc |
2004-2005 13.5-1
2006 - 2009 13.75-1 |
bore and replate cylinder |
cp m1008
$229.75
|
|
cp c7502
$49.95
|
|
| 98mm +3mm big bore |
468cc
478cc |
2004-2005 12.5-1
2006 - 2009 12.75-1 |
bore and replate cylinder |
cp m1009
$229.75
|
|
cp c7502
$49.95
|
|
2004 - 2005 / 2006-2007-2008 2009 Yamaha YFZ 450 ATV FULL
RACE Pistons
Stock Bore is 95mm (3.740")
Stock Stroke 2004-2005 is 62mm (2.440")
Stock Stroke 2006-2007-2008 2009 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. |
| 95mm std. |
439cc
449cc |
2004-2005 13.25-1
2006 - 2009 13.5-1 |
deglaze cylinder |
cp
m1026
$278.25
|
|
cp c7479
$49.95
|
|
Cylinder Works NEW YFZ 450 Standard Bore and YFZ450 Big Bore Cylinders
Cylinder Works convenient drop in four stroke YFZ450 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. |
|
Bore Size
|
Disp.
|
Model Years
|
Cylinder Part # and Price
|
| 95mm standard |
450cc |
2004 - 2009 |
cw 20001
$235.95 $228.87
|
|
| 98mm +3mm oversize big bore |
478cc |
2004 - 2009 |
cw 21001
$265.95 $257.97
|
|
Cylinder Works YFZ 450 Big Bore Kits
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 - 2009 models
|
|
Bore Size
|
Disp.
|
Model
Years |
Complete YFZ 450 Big Bore Kit |
Replacement YFZ450 Big Bore Piston |
YFZ450 Big Bore Top End Gasket Kit |
Big Bore YFZ450 Piston Ring Set |
| 98mm +3mm big bore |
478cc |
2004-09 |
cw 21001-k01
$549.95 $533.45
|
|
cw 21001-p01
$0.00
|
|
cw 21001-g01
$0.00
|
|
cw 21001-r01
$0.00
|
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Wiseco YFZ450 Pistons, Piston Kits, Top End Gasket Kits and Complete Big Bore Kits with Cylinders
Wiseco 2004 2005 / 2006 2007 2008 2009 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 2004 - 2005 is 62mm (2.440")
-
Stock Stroke 2006-2007-2008 2009 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 |
2004-2005 12-1
2006 - 2009 12.25-1 |
deglaze cylinder |
Wiseco
4865M09500
$188.24 $169.42
|
|
Wiseco PK1071
$249.08 $224.17
|
|
Wiseco W6129
$97.39 $87.65
|
|
| 95mm std. |
439cc
449cc |
2004-2005 13-1
2006 - 2009 13.25-1 |
deglaze cylinder |
Wiseco
4835M09500
$231.38 $208.24
|
|
Wiseco PK1064
$328.77 $295.89
|
|
Wiseco W6129
$97.39 $87.65
|
|
| 96mm +1mm big bore |
449cc
459cc |
2004-2005 12-1
2006 - 2009 12.25-1 |
bore and replate cylinder |
Wiseco
4865M09600
$188.24 $169.42
|
|
Wiseco PK1072
$267.92 $241.13
|
|
Wiseco W6248
$60.84 $54.76
|
|
| 96mm +1mm big bore |
449cc
459cc |
2004-2005 13-1
2006 - 2009 13.25-1 |
bore and replate cylinder |
Wiseco
4835M09600
$254.51 $229.06
|
|
Wiseco PK1065
$315.35 $283.82
|
|
Wiseco W6248
$60.84 $54.76
|
|
| 98mm +3mm big bore |
468cc
478cc |
2004-2005 12-1
2006 - 2009 12.25-1 |
bore and replate cylinder
or purchase CK kit which
includes new cylinder |
Wiseco
4906M09800
$253.41 $228.07
|
|
Wiseco CK189
$1054.89 $949.4
|
This is a complete big bore kit which includes a new cylinder |
Wiseco W6414
$95.05 $85.55
|
|
Wiseco RACE ONLY YFZ450 2004 - 2005 / 2006-2007-2008 2009 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 - 2009 14-1 |
deglaze cylinder |
Wiseco
4929M09500
$281.98 $253.78
|
|
not available |
Wiseco W6129
$97.39 $87.65
|
|
The piston and gaskets listed on this page fit the
following model year Yamaha YFZ450 ATV Race Quad:
2004 2005 2006 2007 2008 2009 YFZ 450
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Great Deals on other Motocross Parts and Accessories
We hope you will choose to purchase your CP Pistons, Wiseco, Hot Cams and CV4 products from us here at Campbell Enterprises. For the many other parts you need for your dirt bike or quad we recommend the following companies. We hope you find them helpful and that they save you some cash. We figure the more they save you, the more you have to come back and visit us with 
For OEM (Original Equipment Manufacturer) parts we recommend BikeBandit for OEM parts & online schematics  . They have a huge selection of aftermarket parts also.
For riding gear, apparel and accessories Cycle Gear is a good choice.
In addition to those two we also shop at Motorcycle Superstore  and MotoSport.com . If you have the time it is a good idea to check with each of them to compare prices. They all often run special sales, offer free shipping, etc. so you can often save a bit more by checking them all out before making a purchase.
More Fun Stuff and Money Saving Deals
Once in a while we all need (or are forced due to injury) to do something other than play in the dirt. For those times Bass Pro Shops  is a favorite for many of us outdoor types.
On those long trips everyone enjoys good music or a movie and the iTunes Store is a frequent stop.
For those of you that drive an RV to the races or riding area, The Good Sam Club offers Emergency Road Service, and many other helpful plans to take some of the worry out of those long road trips and save you some serious money. They also have a great Extended Service Plan and they want to pay your RV repair bills. 
And for the golfers out there, The Golf Card offers great discounts for green fees, Pro Shop item purchases and more at over 3000 courses nationwide. If you enjoy getting in a few rounds while you are traveling, then this program can really save you a lot of money every year. Get Golf Card today and receive a free 1-year subscription to Golf Magazine! 
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