2003-2006 Kawasaki KFX400 12.0:1 90mm std bore x 62.2mm stroke (398cc) piston kit
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2003-2006 Kawasaki KFX400 12.0:1 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 |
12.0:1 |
|
Piston Part Number |
M4023 |
|
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 12.0:1 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 M4023 piston kit?
For the M4023 piston kit, the recommended bore clearance typically ranges from 0.0015" to 0.0025". However, this can vary based on the specific application and the builder's preferences, so it's crucial to measure accurately and adjust according to your engine's requirements.
What is the compression ratio of the M4023 piston kit and how does it affect performance?
The M4023 piston kit has a compression ratio of 12.0:1. This higher compression ratio can improve performance by increasing the engine's thermal efficiency, but it also requires high-quality fuel to prevent knocking and ensure reliability, especially under load.
What type of rings are included in the M4023 piston kit?
The M4023 piston kit includes CP's CPN2-3543 ring sets, which are designed to provide optimal sealing and performance. It's important to follow the manufacturer's specifications for ring gap settings to ensure proper function and longevity.
Are there any specific machining requirements for installing the M4023 pistons?
Yes, when installing the M4023 pistons, it's essential to ensure that the cylinder bore is properly honed to match the piston dimensions. Additionally, the piston pin bores may require reaming or honing to ensure a proper fit with the wrist pins included in the kit.
What is the weight tolerance for the M4023 pistons?
The M4023 pistons are balanced to within +/- 1 gram. This precision helps maintain engine balance and reduces vibrations, which is crucial for high-performance applications where reliability and smooth operation are paramount.
