2003-2009 YZ450F 13.75:1 95mm std bore x 63.4mm stroke (449cc) piston kit
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2003-2009 YZ450F 13.75:1 95mm std bore x 63.4mm stroke (449cc) piston kit
|
Make |
Yamaha |
|
Engine Size |
450cc |
|
Model |
YZ450F |
|
Year |
2003-2009 |
|
Bore (mm) |
95mm |
|
Comp Ratio |
13.75:1 |
|
Piston Part Number |
MX1043 |
|
Gasket Part Number |
Call |
|
Conrod Part Number |
PSR9271A |
|
Pin Part Number |
S708-2000-15C |
|
Locks Part Number |
708x050 SWL |
|
Rings |
CPN2-2-3740 |
|
Shelf (RPO) or Made to Order (MTO) |
MTO |
Proudly made in the USA by CP Carrillo Pistons!
- Fully CNC machined
- Balanced to +/- 1 gram
- Double forced pin oilers
- Forged from high strength 2618 alloy
- Designed for maximum performance, horsepower and reliability
- Complete kit includes two pistons, ring sets, wrist pins and clips
- Follow ring end gap and piston to cylinder clearances as per the supplied instructions
| Product Name | 2003-2009 YZ450F 13.75:1 95mm std bore x 63.4mm stroke (449cc) piston kit |
|---|---|
| Brands | CP Carrillo |
Delivery & Freight
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What information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What is the recommended bore clearance for the MX1043 piston kit?
The recommended bore clearance for the MX1043 piston kit should be determined by the engine builder, taking into account the specific application and operating conditions. Typically, a clearance of around 0.0015" to 0.0025" is a good starting point, but always refer to the manufacturer's guidelines and adjust based on your engine's needs.
What type of fuel is best suited for the 13.75:1 compression ratio of this piston kit?
For a 13.75:1 compression ratio, it is advisable to use high-octane fuel, typically 98 RON or higher, to prevent detonation and ensure optimal performance. Fuel quality is critical, so always use reputable brands and consider tuning the engine to match the fuel type.
Do I need to modify my cylinder head when installing the MX1043 piston kit?
While the MX1043 piston kit is designed to fit the standard YZ450F cylinder head, you may need to check for clearance issues, especially with valve pockets. Depending on your engine's setup and intended use, some builders choose to modify the cylinder head for improved airflow and performance.
What is included in the MX1043 piston kit?
The MX1043 piston kit includes two forged pistons, complete ring sets, wrist pins, and clips. This comprehensive kit is designed for ease of installation and to ensure compatibility with your YZ450F engine.
How should I break in the engine after installing the MX1043 piston kit?
After installing the MX1043 piston kit, it is crucial to follow a proper break-in procedure. This typically involves running the engine at varying RPMs and loads for the first few hours to allow the piston rings to seat properly. Refer to the specific break-in recommendations provided by the piston manufacturer for best results.
