Harley Twin Cam, 103 cu in, 3.875 bore, 4.375 stroke, 7.667 rod, 10:1 CR, 85cc head
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Harley Twin Cam, 103 cu in, 3.875 bore, 4.375 stroke, 7.667 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 |
-1.5 |
|
Comp Height |
1.085 |
|
Piston Part Number |
BHM5065 |
|
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) |
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 | Harley Twin Cam, 103 cu in, 3.875 bore, 4.375 stroke, 7.667 rod, 10:1 CR, 85cc head |
|---|---|
| Brands | CP Carrillo |
Delivery & Freight
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Product images are for description purposes only. Actual product may vary.
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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 BHM5065 pistons?
For the BHM5065 pistons, a typical bore clearance of 0.0025" to 0.0030" is recommended. This ensures proper thermal expansion and reduces the risk of piston slap. Always verify with your specific engine build requirements.
What type of rings are included with the BHM5065 piston kit?
The BHM5065 piston kit includes RS1660-3875-0THG rings, which are designed for optimal sealing and performance. Ensure you follow the manufacturer's specifications for ring end gaps during installation.
What is the compression height of the BHM5065 pistons?
The compression height of the BHM5065 pistons is 1.085 inches. This measurement is critical for achieving the desired compression ratio in your Harley Twin Cam engine.
What material are the BHM5065 pistons made from?
The BHM5065 pistons are forged from high strength 2618 alloy, which provides excellent durability and performance under high-stress conditions typical in performance applications.
How are the BHM5065 pistons balanced?
The BHM5065 pistons are balanced to within +/- 1 gram. This precision helps to reduce vibrations and improve engine performance, especially at higher RPMs.
