504355 Replacement XL1000 cast piston. +.060"

This replacement cast piston in +0.060-inch oversize restores proper cylinder sealing on 1972-1985 XL1000 Sportster engines that have been bored to accommodate wear. With a standard 9:1 compression ratio, it is ideal for stock rebuilds that prioritise reliability and correct factory performance. Each piston comes complete with wristpin and wristpin clips, though piston rings must be purchased separately. Cast construction offers a low expansion rate and predictable performance characteristics. Professional installation by a qualified mechanic is required, as the technician must verify component compatibility with other engine parts before assembly. Follow standard break-in procedures for overhauled engines to ensure proper ring seating.