Description
If you’re running an 883cc or 1200cc Big Twin and want real displacement gains without a complete engine overhaul, the S&S CYCLE Piston Kit 92-1401 delivers a straightforward path to 1250cc performance. This cast flat-topped design maximizes compression efficiency at 10.3:1, giving you measurable increases in power and torque while maintaining compatibility with your existing cylinder heads. Whether you’re upgrading a vintage cruiser or building a custom street bike, these pistons are engineered to handle the demands of serious riders.
- Increases displacement: 1250cc
- Compression ratio: 10.3:1
- Piston design: Cast flat-topped
- Bore diameter: 3-9/16″
- Compatibility: 1984–’99 HD Big Twins
- Works with: Stock 1200cc heads
- Recommended pairing: S&S CNC ported heads
- Cylinder compatibility: 1986–’03 883cc (rebore required)
- Cylinder compatibility: Stock 1200cc (rebore required)
- Not compatible: 2004–’16 883cc cylinders
- Installation: Requires machine work
- Manufacturer: S&S CYCLE
- Part number: 92-1401
