2017-2022 Harley Milwaukee Eight 143 ci, 4.500" bore, 4.500" stroke, 11.5:1 CR, 1.080" CH -12.5cc DV
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2017-2022 Harley Milwaukee Eight 143 ci, 4.500" bore, 4.500" stroke, 11.5:1 CR, 1.080" CH -12.5cc DV
|
Make |
Harley Davidson |
|
Engine Size |
143 CI |
|
Model |
Milwaukee 8 2017-2022 |
|
Bore (in) |
4.5 |
|
Stroke (in) |
4.5 |
|
Comp Ratio |
11.5:1 |
|
Dome CC |
-12.5 |
|
Comp Height |
1.08 |
|
Piston Part Number |
M5151 |
|
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) |
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 143 ci, 4.500" bore, 4.500" stroke, 11.5:1 CR, 1.080" CH -12.5cc DV |
|---|---|
| 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 piston-to-cylinder clearance for the M5151 pistons?
For the M5151 pistons, a typical piston-to-cylinder clearance should be set according to the engine builder's specifications, generally around 0.0025" to 0.0035". Always refer to the specific instructions provided with the pistons and consider the application and operating conditions.
What type of rings are included with the M5151 piston kit?
The M5151 piston kit includes a complete set of rings: 1-MG10-4505, 2-MS20-4505-THG, and 3-D30-4500-0. Ensure that you follow the manufacturer's guidelines for ring gap settings for optimal performance.
What is the significance of the -12.5cc dome volume in the M5151 pistons?
The -12.5cc dome volume in the M5151 pistons contributes to the overall compression ratio of 11.5:1. This design helps achieve a balance between performance and reliability, but it's crucial to ensure that the combustion chamber is compatible and that the engine is tuned appropriately for this compression ratio.
Can I use the M5151 pistons with stock Harley Davidson conrods?
The M5151 pistons are designed to work with the PSR10087 conrods. While they may fit stock conrods, it's essential to verify compatibility, especially regarding pin size and clearances, to ensure proper operation and reliability.
What machining processes should be considered when installing M5151 pistons?
When installing M5151 pistons, ensure that the cylinder bores are properly honed to match the piston size and that the ring gaps are set according to specifications. Additionally, check for any necessary balancing of the rotating assembly to maintain engine reliability and performance.
