2017-2022 Harley Milwaukee Eight 139 ci, 4.500" bore, 4.375" stroke, 11.5:1 CR, 1.143" CH
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2017-2022 Harley Milwaukee Eight 139 ci, 4.500" bore, 4.375" stroke, 11.5:1 CR, 1.143" CH
|
Make |
Harley Davidson |
|
Engine Size |
139 CI |
|
Model |
Milwaukee 8 2017-2022 |
|
Bore (in) |
4.5 |
|
Stroke (in) |
4.375 |
|
Comp Ratio |
11.5:1 |
|
Dome CC |
-9.6 |
|
Comp Height |
1.143 |
|
Piston Part Number |
M5141 |
|
Conrod Part Nmber |
PSR10087 |
|
Pint Part Number |
927-2500-18CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
1-MG10-4505 2-MS20-4505-THG 3-D30-4500-0 |
|
Shelf (RPO) or Made to Order (MTO) |
MTO |
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 139 ci, 4.500" bore, 4.375" stroke, 11.5:1 CR, 1.143" CH |
|---|---|
| Brands | CP Carrillo |
Delivery & Freight
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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 is the recommended compression ratio for the M5141 pistons?
The M5141 pistons are designed for an 11.5:1 compression ratio, which is suitable for performance applications in the Harley Milwaukee Eight engine. Ensure that your engine build supports this compression for optimal performance.
What material are the M5141 pistons made from?
The M5141 pistons are forged from high strength 2618 alloy, providing excellent durability and performance under high-stress conditions typical in performance Harley Davidson applications.
What are the specific machining requirements for installing the M5141 pistons?
When installing the M5141 pistons, ensure to follow the manufacturer's instructions for piston-to-cylinder clearance and ring end gap settings. Proper machining of the cylinder bore is crucial for achieving the correct clearances.
What is included in the complete kit for the M5141 pistons?
The complete kit for the M5141 pistons includes two pistons, ring sets, wrist pins, and clips, providing everything needed for installation in your Harley Milwaukee Eight engine.
How are the M5141 pistons balanced?
The M5141 pistons are balanced to within +/- 1 gram, which is essential for maintaining engine smoothness and performance, especially at higher RPMs.
