2017-2022 Harley Milwaukee Eight 107 cu in, 3.937 bore, 4.375 stroke, 10.5:1 C/R, 1.143 C/H, 4 dome cc’s
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2017-2022 Harley Milwaukee Eight 107 cu in, 3.937 bore, 4.375 stroke, 10.5:1 C/R, 1.143 C/H, 4 dome cc’s
|
Make |
Harley Davidson |
|
Engine Size |
107 CI |
|
Model |
Milwaukee 8 2017-2022 |
|
Bore (in) |
3.937 |
|
Stroke (in) |
4.375 |
|
Comp Ratio |
10.5:1 |
|
Dome CC |
4 |
|
Comp Height |
1.143 |
|
Piston Part Number |
BHM8107-4 |
|
Conrod Part Nmber |
PSR10087 |
|
Pint Part Number |
927-2250-20CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
CPN-3937 |
|
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 107 cu in, 3.937 bore, 4.375 stroke, 10.5:1 C/R, 1.143 C/H, 4 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 is the recommended bore clearance for the BHM8107-4 pistons?
The recommended bore clearance for the BHM8107-4 pistons should be determined by the engine builder based on the specific application and intended use. Generally, a clearance of 0.0035" to 0.0045" is typical for performance applications, but always consult the manufacturer's guidelines and adjust based on your engine's characteristics.
What type of rings are included with the BHM8107-4 piston kit?
The BHM8107-4 piston kit includes CP rings, specifically designed for high-performance applications. Ensure you follow the manufacturer's instructions for proper ring end gap settings to optimise performance and reliability.
Can I use the BHM8107-4 pistons with stock conrods?
While the BHM8107-4 pistons can be used with stock conrods, it is advisable to upgrade to performance conrods, such as the PSR10087, for enhanced strength and reliability under higher power outputs. Always verify compatibility and clearances before installation.
What is the compression ratio of the BHM8107-4 pistons, and how does it affect performance?
The BHM8107-4 pistons have a compression ratio of 10.5:1. This higher compression ratio can improve performance by increasing power output and efficiency, but it also requires careful tuning and high-quality fuel to avoid knock and ensure engine reliability.
What machining processes are recommended for the BHM8107-4 pistons?
Before installation, it is essential to ensure that the cylinder bores are properly honed to match the piston specifications. Additionally, verify that the piston-to-wall clearance and ring gaps are set according to the provided instructions to ensure optimal performance and longevity.
