S&S CYCLE Piston Kit 92-2017

Looking to unlock genuine displacement gains from your Big Twin? The S&S Cycle 1250cc Piston Kit delivers a straightforward path to increased cubic inches, higher compression, and measurable power improvements without requiring complete engine redesign. Whether you're building a stock-headed cruiser or pairing these pistons with S&S performance heads, this kit gives you the displacement advantage serious riders demand.

This is a bolt-on displacement upgrade engineered for 1984–1999 HD Big Twins. The cast flat-topped pistons are precision-manufactured to exact tolerances and work seamlessly with your existing cylinder and head combination—though proper cylinder boring and head selection are critical for optimal results.

• Increases displacement to 1250cc
• 10.3:1 compression ratio
• Cast flat-topped design
• 3-9/16" bore diameter
• Compatible with 1984–1999 Big Twins
• Works with stock 1200cc heads
• S&S CNC heads recommended
• Requires cylinder boring
• Stock 1200cc cylinders compatible
• 1986–2003 883cc cylinders compatible
• 2004–2016 883cc cylinders NOT compatible
• Complete piston kit included