910-0687 883-1200 XL big bore conversion cyl. & piston kit

Boost your Sportster's performance with the S&S 883 to 1200 Big Bore conversion kit, featuring OEM-style black painted cylinders for a factory look. This kit fits 1986 to 2022 Harley-Davidson Sportster 883 models and is designed for a direct bolt-on installation with no engine modifications required. The pistons are engineered with a dished dome and matched to stock weight, so you can skip the expensive crank re-balancing. This setup works perfectly with your original 883 heads to provide a 9.4:1 compression ratio. Sold as a set, the kit includes everything needed for the top-end rebuild, including installation lube, head gaskets, base gaskets, exhaust gaskets, and detailed instructions. It is the gold standard for reliable Sportster power upgrades.