S&S CYCLE Piston Kit 106-5793

If you're running an 883cc or 1200cc Big Twin and want genuine displacement gains without complete engine teardown, the S&S CYCLE 1250cc Piston Kit delivers 67 additional cubic centimeters of swept volume with a proven 10.3:1 compression ratio. This is a bolt-on path to increased torque and horsepower when paired with quality cylinder work and proper tuning. For serious builders targeting maximum performance from classic and modern Harley-Davidson Big Twins, this kit is the foundation for real power gains.

• Displacement: 883cc/1200cc to 1250cc
• Compression ratio: 10.3:1
• Piston design: Cast flat-topped
• Bore diameter: 3-9/16"
• Compatibility: 1984–'99 Big Twins
• Works with: Stock heads or S&S performance heads
• Cylinder compatibility: Stock 1200cc cylinders
• Compatible: 1986–'03 883cc cylinders (bored)
• Not compatible: 2004–'16 883cc cylinders
• Installation: Professional cylinder boring required
• Manufacturer part #: 106-5793