2017-2022 Harley Milwaukee Eight 117 cu in, 4.125 bore, 4.375 stroke, 10.75:1 C/R, 1.143 C/H, -1.3 dome cc’s
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2017-2022 Harley Milwaukee Eight 117 cu in, 4.125 bore, 4.375 stroke, 10.75:1 C/R, 1.143 C/H, -1.3 dome cc’s
|
Make |
Harley Davidson |
|
Engine Size |
117 CI |
|
Model |
Milwaukee 8 2017-2022 |
|
Bore (in) |
4.125 |
|
Stroke (in) |
4.375 |
|
Comp Ratio |
10.75:1 |
|
Dome CC |
-1.3 |
|
Comp Height |
1.143 |
|
Piston Part Number |
BHM8117-FT |
|
Conrod Part Nmber |
PSR10087 |
|
Pint Part Number |
927-2250-20CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
1-N16-4125-0 2-N26-4125-OTHG 3-M38-4125 |
|
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 117 cu in, 4.125 bore, 4.375 stroke, 10.75:1 C/R, 1.143 C/H, -1.3 dome cc’s |
|---|---|
| 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 are the recommended clearances for the BHM8117-FT pistons?
For the BHM8117-FT pistons, it's crucial to follow the manufacturer's guidelines for piston-to-cylinder clearance. Typically, a clearance of 0.0025" to 0.0035" is recommended for performance applications, but it's best to confirm with your engine builder based on your specific setup.
What type of rings are included with the BHM8117-FT piston kit?
The BHM8117-FT piston kit includes a three-ring set: 1-N16-4125-0 for the top ring, 2-N26-4125-OTHG for the second ring, and 3-M38-4125 for the oil ring. Ensure you follow the proper installation and end gap settings as per the supplied instructions.
Can the BHM8117-FT pistons be used with a stock Harley Davidson crankshaft?
Yes, the BHM8117-FT pistons are designed to work with the stock Harley Davidson Milwaukee Eight crankshaft. However, ensure that your engine is properly machined and assembled to handle the increased compression ratio of 10.75:1 for optimal performance.
What is the significance of the -1.3 dome cc in the BHM8117-FT pistons?
The -1.3 dome cc indicates the volume of the piston dome, which affects the overall compression ratio of the engine. A negative dome volume helps increase the compression ratio, which can enhance performance, but it’s important to ensure compatibility with your cylinder head design and combustion chamber.
What is the weight tolerance for the BHM8117-FT pistons?
The BHM8117-FT pistons are balanced to within +/- 1 gram, which is critical for maintaining engine smoothness and performance at higher RPMs. Always check the balance of the entire rotating assembly during your build for optimal results.
