2017-2022 Harley Milwaukee Eight 131 ci, 4.310" bore, 4.500" stroke, 11.0:1 CR, 1.080" CH
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2017-2022 Harley Milwaukee Eight 131 ci, 4.310" bore, 4.500" stroke, 11.0:1 CR, 1.080" CH
|
Make |
Harley Davidson |
|
Engine Size |
131 CI |
|
Model |
Milwaukee 8 2017-2022 |
|
Bore (in) |
4.31 |
|
Stroke (in) |
4.5 |
|
Comp Ratio |
11.0:1 |
|
Dome CC |
-9.6 |
|
Comp Height |
1.08 |
|
Piston Part Number |
M5120 |
|
Conrod Part Nmber |
PSR10087 |
|
Pint Part Number |
927-2250-18CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
1-S10-4310-5 2-MS20-4315-THG 3-D30-4310-0 |
|
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 | 2017-2022 Harley Milwaukee Eight 131 ci, 4.310" bore, 4.500" stroke, 11.0:1 CR, 1.080" CH |
|---|---|
| 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 M5120 pistons?
The recommended bore clearance for the M5120 pistons should be set according to the specific engine build and application. Generally, a clearance of 0.0025" to 0.0035" is a good starting point, but always consult with your engine builder for precise specifications based on your setup.
What type of rings are included with the M5120 piston kit?
The M5120 piston kit includes a complete set of rings: 1-S10-4310-5 for the top ring, 2-MS20-4315-THG for the second ring, and 3-D30-4310-0 for the oil ring. Ensure proper installation and gap settings as per the supplied instructions.
What is the maximum recommended compression ratio for the M5120 pistons?
The M5120 pistons are designed for an 11.0:1 compression ratio. While this is suitable for performance applications, ensure that your fuel quality and engine tuning can support this compression level to avoid detonation.
Do I need to machine the cylinder head for the M5120 pistons?
Depending on your specific engine setup, you may need to machine the cylinder head to accommodate the 11.0:1 compression ratio of the M5120 pistons. It's essential to check piston-to-valve clearance and overall engine geometry during assembly.
What is the weight tolerance for the M5120 pistons?
The M5120 pistons are balanced to within +/- 1 gram. This precision helps ensure smooth operation and performance, but always verify the balance of the entire rotating assembly during engine build for optimal results.
