2002-2008 Honda CRF250R 13.5:1 81mm +3mm oversize bore x 52.2mm stroke (268cc) piston kit
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2002-2008 Honda CRF250R 13.5:1 81mm +3mm oversize bore x 52.2mm stroke (268cc) piston kit
|
Make |
Honda |
|
Engine Size |
250cc |
|
Model |
CRF250R |
|
Year |
2002-2008 |
|
Bore (mm) |
81mm |
|
Comp Ratio |
13.5:1 |
|
Piston Part Number |
MX2051D |
|
Gasket Part Number |
C7189 |
|
Conrod Part Number |
PSR8822A |
|
Pin Part Number |
S630-1650-13C |
|
Locks Part Number |
630x050 SWL |
|
Rings |
CPN2-2-3189 |
|
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 | 2002-2008 Honda CRF250R 13.5:1 81mm +3mm oversize bore x 52.2mm stroke (268cc) 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 MX2051D piston kit?
The recommended bore clearance for the MX2051D piston kit should be set according to the specific engine builder's guidelines, typically around 0.0015" to 0.0025". Always refer to the supplied instructions for precise measurements.
What type of fuel is best suited for the 13.5:1 compression ratio of this piston kit?
For the 13.5:1 compression ratio, it is advisable to use high-octane fuel, ideally 98 RON or higher, to prevent detonation and ensure optimal performance. Fuel quality is critical for reliability and power.
Do I need to modify my cylinder head for the MX2051D piston kit?
Depending on the existing setup, you may need to check for clearance issues with the cylinder head, particularly if using aftermarket components. It's essential to ensure that the piston does not make contact with the head at TDC.
What is included in the MX2051D piston kit?
The MX2051D piston kit includes two pistons, ring sets, wrist pins, and clips. Ensure all components are checked for compatibility with your engine before installation.
How should I break in the engine after installing the MX2051D piston kit?
After installation, follow a proper break-in procedure which typically involves varying RPMs and avoiding full throttle for the first few hours of operation. This helps ensure proper seating of the rings and longevity of the piston.
