2017-2022 Harley Milwaukee Eight 131 ci, 4.310" bore, 4.500" stroke, 12.0:1 CR, 1.080" CH
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2017-2022 Harley Milwaukee Eight 131 ci, 4.310" bore, 4.500" stroke, 12.0:1 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 |
12.0:1 |
|
Dome CC |
0.39 |
|
Comp Height |
1.08 |
|
Piston Part Number |
M5122 |
|
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, 12.0:1 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 M5122 pistons?
For the M5122 pistons, a typical bore clearance of 0.0025" to 0.0035" is recommended. However, always verify with your specific engine build requirements and adjust based on the intended use and operating temperatures.
What type of rings are included with the M5122 piston kit?
The M5122 piston kit includes a complete set of rings: 1-S10-4310-5, 2-MS20-4315-THG, and 3-D30-4310-0. Ensure to follow the manufacturer's specifications for installation and ring gap settings.
What is the maximum safe RPM for the M5122 pistons in a Milwaukee Eight engine?
While the M5122 pistons are designed for high performance, the maximum safe RPM will depend on various factors including engine build, tuning, and components used. Generally, staying within the 6,000 to 7,000 RPM range is advisable for reliability, but always consult with your engine builder.
Do I need to modify my cylinder heads when using M5122 pistons?
Using M5122 pistons with a 12.0:1 compression ratio may require modifications to the cylinder heads to ensure proper clearance and performance. It's essential to check for valve clearance and overall fitment during assembly.
What is the weight of the M5122 pistons, and how does it affect my build?
The M5122 pistons are designed to be lightweight, which helps reduce reciprocating mass and improve engine response. However, the exact weight can vary slightly; always balance them with your rotating assembly to maintain optimal performance.
