S&S CYCLE Piston Kit 920-0015
Part Number: 09105261S&S CYCLE
- SKU:
- 09105261
- MPN:
- 920-0015
- Condition:
- New
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
Description
Building serious displacement on your Big Twin? The S&S CYCLE Piston Kit 920-0015 delivers a straightforward path to 1250cc without sacrificing reliability. By stepping up from stock bore dimensions, you gain meaningful low-end torque and mid-range power while maintaining the 10.3:1 compression ratio that works with both stock and performance heads.
Whether you're running a classic 883cc or pushing a 1200cc platform, this cast flat-topped design has been proven in the field since 1984. Installation is straightforward on compatible big-block cases, and the geometry plays well with stock cylinder heads—though pairing these pistons with S&S CNC ported heads unlocks their full potential.
- Displacement: 1250cc
- Compression ratio: 10.3:1
- Bore diameter: 3-9/16"
- Piston type: Cast flat-topped
- Compatibility: 1984–'99 HD Big Twins
- Works with: Stock heads or S&S performance heads
- Requires boring: 1200cc and 1986–'03 883cc cylinders
- Not compatible: 2004–'16 883cc cylinders
- Installation: Bolt-on (on prepared cylinders)
- MPN: 920-0015
Specs
DISPLACEMENT: |
80' |
PISTON HEAD SHAPE: |
FLAT TOP |
TYPE: |
REPLACEMENT |
BORE SIZE IMPERIAL: |
3.500' |
PISTON MATERIAL: |
CAST |
UNITS: |
KIT |
BORE - OVERSIZE: |
STANDARD |
PRODUCT NAME: |
PISTON KIT |
RIDING STYLE: |
STREET |
STROKE LENGTH IMPERIAL: |
4-1/4' |
BORE OVERSIZE - IMPERIAL: |
STANDARD |
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