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3 9/16" (90.49mm) 1250cc Big Bore cylinder and piston kits, Silver
These kits convert 1986-1987 XL1100 and 1988-2022 XL1200 Sportster to 1250cc displacement. No machining or rebalancing is required. Kit contains forged flat topped 3 9/16" bore pistons with coated piston skirts, S&S 3 9/16" bore cylinders, MLS head gaskets, base gaskets, exhaust gaskets, assembly lube, and instructions. Kits can also be used on XL883 when installed with XL1200 cylinder heads.