2001-04 YZ250F 13.5:1 77mm std bore x 53.6mm stroke (250cc) piston kit
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2001-04 YZ250F 13.5:1 77mm std bore x 53.6mm stroke (250cc) piston kit
|
Make |
Yamaha |
|
Engine Size |
250cc |
|
Model |
YZ250F |
|
Year |
2001-2004 |
|
Bore (mm) |
77mm |
|
Comp Ratio |
13.5:1 |
|
Piston Part Number |
M1029C |
|
Gasket Part Number |
C3057 |
|
Conrod Part Number |
PSR8807A |
|
Pin Part Number |
W630-1650-13CP1C |
|
Locks Part Number |
630x050 SWL |
|
Rings |
CP7700C |
|
Shelf (RPO) or Made to Order (MTO) |
ROP |
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 | 2001-04 YZ250F 13.5:1 77mm std bore x 53.6mm stroke (250cc) piston kit |
|---|---|
| Brands | CP Carrillo |
Delivery & Freight
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If you are unsure, get in touch by emailing [email protected], messaging us on Facebook, or phoning us at +61 7 5645 1333 (8am to 2pm AET).
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 are the recommended clearances for the M1029C piston kit?
For the M1029C piston kit, it is crucial to follow the manufacturer's specifications for piston to cylinder clearance and ring end gaps. Typically, a clearance of 0.0025" to 0.0030" is recommended for the bore, but always verify with the supplied instructions and adjust based on your specific engine build.
What type of fuel is recommended for the 13.5:1 compression ratio?
For the M1029C piston kit with a 13.5:1 compression ratio, it is advisable to use high-octane fuel, typically 98 RON or higher, to prevent knocking and ensure optimal performance. Always consider your engine's tuning and setup when selecting fuel.
Do I need to modify my cylinder head when using this piston kit?
Depending on your engine's current setup, you may need to modify the cylinder head to accommodate the increased compression ratio of the M1029C piston kit. This could include reshaping combustion chambers or adjusting valve clearances. Always consult with a professional engine builder for specific recommendations.
How should I break in the engine after installing the M1029C piston kit?
After installing the M1029C piston kit, follow a proper break-in procedure to ensure longevity and performance. This typically involves running the engine at varying RPMs without exceeding 50% of the maximum load for the first few hours, gradually increasing load and RPMs over time. Always refer to the engine builder's guidelines for specific break-in recommendations.
What is included in the M1029C piston kit?
The M1029C piston kit includes two high-strength forged pistons, ring sets, wrist pins, and clips. This complete kit is designed for ease of installation and optimal performance in the 2001-04 Yamaha YZ250F.
