Description
If you’re running an 883cc or 1200cc Big Twin and want real power gains without a complete engine rebuild, the S&S CYCLE Piston Kit 92-2047 delivers a straightforward path to 1250cc displacement and measurable performance improvement. This cast flat-topped design maintains reliability while the 10.3:1 compression ratio provides noticeable torque and horsepower increases across the RPM band. Bolt the kit into your existing engine with stock heads, or pair it with S&S CNC ported heads for optimized combustion chamber dynamics and maximum output.
- Displacement: 1250cc upgrade
- Compression ratio: 10.3:1
- Piston type: 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-‘2003 883cc cylinders (requires boring)
- Cylinder compatibility: Stock 1200cc cylinders (requires boring)
- Not compatible: 2004-’16 883cc cylinders
- Installation: Professional boring required
- MPN: 92-2047
