S&S Cycle Royal Enfield 650 Twin High-Compression 11 To 1 Piston Kit

These high compression pistons feature a 7cc raised dome to achieve a compression ratio of 11:1 (from 9.5:1). Higher compression is a key factor in increasing performance.

• Stock Bore X Stroke = 78 x 67.8mm, S&S 650 HC Kit = 78 x 67.mm
• Stock Compression Ratio = 9.5:1, S&S 650 HC Kit = 11.0:1

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

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Reference Information