2014-2018 Yamaha YZ250F 14.0:1 77mm std bore x 53.6mm stroke platinum series 1mm smaller pin/ 2mm longer rod (250cc) piston kit
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2014-2018 Yamaha YZ250F 14.0:1 77mm std bore x 53.6mm stroke platinum series 1mm smaller pin/ 2mm longer rod (250cc) piston kit
|
Make |
Yamaha |
|
Engine Size |
250cc |
|
Model |
YZ250F |
|
Year |
2014-2018 |
|
Bore (mm) |
77mm |
|
Comp Ratio |
14.0:1 |
|
Piston Part Number |
MX1P90C |
|
Gasket Part Number |
C3549 |
|
Conrod Part Number |
PSR8813A |
|
Pin Part Number |
S591-1650-13C |
|
Locks Part Number |
591x040 SWL |
|
Rings |
CP7700C |
|
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 | 2014-2018 Yamaha YZ250F 14.0:1 77mm std bore x 53.6mm stroke platinum series 1mm smaller pin/ 2mm longer rod (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 specific machining requirements for the MX1P90C piston kit?
The MX1P90C piston kit requires careful attention to bore clearance and ring gap settings. Ensure that the cylinder bore is honed to the correct specifications for a 77mm diameter and that the ring gaps are set according to the supplied instructions for optimal performance.
Can I use the MX1P90C piston kit with a stock conrod?
The MX1P90C piston kit is designed for use with a conrod that accommodates the 1mm smaller pin and 2mm longer rod configuration. Ensure that you are using the compatible PSR8813A conrod or verify that your existing conrod meets these specifications.
What is the expected compression ratio with the MX1P90C piston kit?
The MX1P90C piston kit has a compression ratio of 14.0:1. This high compression ratio is designed to maximise performance but requires careful tuning and high-quality fuel to ensure reliability and prevent detonation.
What materials are used in the MX1P90C piston kit?
The MX1P90C piston kit is forged from high strength 2618 alloy, which provides excellent durability and performance characteristics. The pistons are also fully CNC machined and balanced to +/- 1 gram for precision.
What components are included in the MX1P90C piston kit?
The MX1P90C piston kit includes two pistons, ring sets, wrist pins, and clips. This complete kit is designed to provide everything needed for a successful installation in your Yamaha YZ250F.
