Harley Twin Cam, 103 cu in,3.875 bore, 4.375 stroke, 7.659 rod, 10:1 CR, 85cc head
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Harley Twin Cam, 103 cu in,3.875 bore, 4.375 stroke, 7.659 rod, 10:1 CR, 85cc head
|
Make |
Harley Davidson |
|
Engine Size |
103 CI |
|
Model |
Twin Cam |
|
Bore (in) |
3.875 |
|
Stroke (in) |
4.375 |
|
Comp Ratio |
10.1:1 |
|
Dome CC |
-1.6 |
|
Comp Height |
1.092 |
|
Piston Part Number |
BHM5064 |
|
Conrod Part Nmber |
PSR6161 |
|
Pint Part Number |
927-2250-15CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
RS1660-3875-0THG |
|
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 | Harley Twin Cam, 103 cu in,3.875 bore, 4.375 stroke, 7.659 rod, 10:1 CR, 85cc head |
|---|---|
| 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 BHM5064 pistons?
For the BHM5064 pistons, a typical bore clearance of 0.0025" to 0.0030" is recommended. However, always verify with your specific engine build and conditions.
What type of rings are included with the BHM5064 piston kit?
The BHM5064 piston kit includes RS1660-3875-0THG rings, which are designed to provide optimal sealing and performance for your Harley Twin Cam engine.
How should I handle the piston installation for the BHM5064?
Ensure that the piston is installed with the correct orientation, following the markings on the piston. Use proper lubrication on the piston skirts and rings during installation to prevent damage.
What is the compression height of the BHM5064 pistons?
The compression height of the BHM5064 pistons is 1.092 inches. This measurement is critical for achieving the desired compression ratio in your engine.
Are there any specific machining requirements for using the BHM5064 pistons?
Yes, the cylinder bores should be honed to the appropriate size to match the BHM5064 pistons, and ring gaps should be set according to the supplied instructions to ensure optimal performance and reliability.
