2003-2006 Kawasaki KFX400 12.5:1 90mm std bore x 62.2mm stroke (398cc) piston kit
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2003-2006 Kawasaki KFX400 12.5:1 90mm std bore x 62.2mm stroke (398cc) piston kit
|
Make |
Kawasaki |
|
Engine Size |
400cc |
|
Model |
KFX400 |
|
Year |
2003-2006 |
|
Bore (mm) |
90mm |
|
Comp Ratio |
12.5:1 |
|
Piston Part Number |
M4028 |
|
Gasket Part Number |
C7688 |
|
Conrod Part Number |
PSR5485 |
|
Pin Part Number |
787-1875-15CP1C |
|
Locks Part Number |
787x050 SWL |
|
Rings |
CPN2-3543 |
|
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 | 2003-2006 Kawasaki KFX400 12.5:1 90mm std bore x 62.2mm stroke (398cc) 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 M4028 piston kit?
For the M4028 piston kit, the recommended bore clearance should be set according to the manufacturer's specifications, typically around 0.0020" to 0.0030". It's crucial to measure your specific cylinder bore accurately and adjust accordingly to ensure optimal performance and longevity.
What type of fuel is recommended for the 12.5:1 compression ratio of the M4028 pistons?
For the M4028 pistons with a 12.5:1 compression ratio, it is advisable to use high-octane fuel, ideally 98 RON or higher. This will help prevent detonation and ensure reliable operation under performance conditions.
Do I need to modify my cylinder head for the M4028 piston kit?
Depending on your specific setup, you may need to check for valve clearance when installing the M4028 pistons. If the pistons are significantly higher than stock, modifications to the cylinder head or valve reliefs may be necessary to avoid contact.
What is included in the M4028 piston kit?
The M4028 piston kit includes two forged pistons, ring sets, wrist pins, and clips. This complete kit is designed for ease of installation and to ensure compatibility with your Kawasaki KFX400 engine.
What is the significance of the double forced pin oilers in the M4028 pistons?
The double forced pin oilers in the M4028 pistons enhance lubrication to the wrist pin, reducing friction and wear during operation. This feature is particularly beneficial in high-performance applications where engine temperatures can rise significantly.
