Description
If you’re running an 883cc or 1200cc Big Twin and want measurable power gains without a complete engine overhaul, this S&S piston kit delivers a straightforward displacement bump to 1250cc with a solid 10.3:1 compression ratio. The cast flat-top design balances reliability with performance, making it an ideal upgrade for riders who want more torque and horsepower without exotic materials or extreme tuning. Pair it with S&S ported cylinder heads for optimal results, or run it with stock 1200cc heads if your setup demands simplicity.
- Displacement: 883cc → 1250cc
- Compression Ratio: 10.3:1
- Piston Design: Cast flat-top
- Bore Size: 3-9/16″
- Fitment: 1984–1999 HD Big Twins
- Compatible Heads: Stock or S&S performance
- Stock 1200cc cylinders: Requires boring
- 1986–2003 883cc cylinders: Requires boring
- 2004–2016 883cc cylinders: Not compatible
- Installation: Professional machine work required
- MPN: 920-0027
