2004-2020 Yamaha YFZ 450 13.75:1 98mm +3mm oversize bore piston kit
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2004-2020 Yamaha YFZ 450 13.75:1 98mm +3mm oversize bore piston kit
|
Make |
Yamaha |
|
Engine Size |
450cc |
|
Model |
YFZ450 / YFZ450R |
|
Year |
2004-2020 |
|
Bore (mm) |
98mm |
|
Comp Ratio |
13.5:1 468cc 13.75:1 478cc |
|
Piston Part Number |
M1085 |
|
Gasket Part Number |
YFZ450 C3068 YFZ450R C3178 |
|
Conrod Part Number |
04-05 PSR9660A 06-08 custom 09-20 PSR8808A |
|
Pin Part Number |
W787-2000-15CP1C |
|
Locks Part Number |
787x050 SWL |
|
Rings |
CPN2-3858 |
|
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 | 2004-2020 Yamaha YFZ 450 13.75:1 98mm +3mm oversize bore piston kit |
|---|---|
| Brands | CP Carrillo |
Delivery & Freight
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Disclaimer:
Product images are for description purposes only. Actual product may vary.
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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 M1085 piston kit?
For the M1085 piston kit, it is crucial to follow the manufacturer's specifications for piston-to-cylinder clearance and ring end gaps. Generally, a clearance of 0.0025" to 0.0030" is suitable for the 98mm bore, but always refer to the supplied instructions for exact values tailored to your specific build.
What type of fuel is recommended for the M1085 piston kit?
Given the high compression ratio of 13.75:1, it is recommended to use high-octane fuel to prevent detonation. Typically, 98 RON fuel or higher is advisable for optimal performance and reliability, especially under load or high RPM conditions.
Do I need to modify my cylinder head for the M1085 piston kit?
While the M1085 piston kit is designed to fit the Yamaha YFZ 450, modifications to the cylinder head may be necessary to achieve the desired compression ratio and performance. Ensure that the head is properly machined and that valve clearances are checked to avoid any contact with the pistons.
What is included in the M1085 piston kit?
The M1085 piston kit includes two forged pistons, a complete set of rings, wrist pins, and clips. This comprehensive kit is designed for easy installation and optimal performance in the Yamaha YFZ 450.
How should I break in the engine after installing the M1085 pistons?
After installing the M1085 pistons, it is essential to follow a proper break-in procedure. This typically involves running the engine at varying RPMs and loads for the first few hours to ensure proper seating of the rings and to avoid excessive wear. Refer to your engine builder's guidelines for specific break-in recommendations.
