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S&S Cycle

S&S Cycle 865cc Big Bore Kits

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S&S Cycle 865cc Big Bore kits are ideal for Royal Enfield 650 Twins. Designed for closed course racing competition, the kits include pistons, rings, pins, and sleeves. The 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.

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S&S Cycle 865cc Big Bore Kits 920-0145

S&S Cycle 865cc Big Bore Kits 920-0145

S&S Cycle 865cc Big Bore Kits 920-0145

S&S Cycle Royal Enfield 650 Twins 865cc Big Bore Kit

Part Number: SSY-920-0145

Not Yet Reviewed

Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

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