1250 XL/Sportster Bolt-On Big Bore Kit – All Black

Experience the easiest and most reliable way to boost your engine’s power and torque with Revolution Performance bolt-on big bore kits. No need for modifications, these kits are designed for effortless installation.
– Fits 1991-2019 XL/Sportster 1200 motorcycles
– Aerospace-grade all-aluminum cylinder with Nickel-Silicon-Carbide (NSC) electroplated bore
– No sleeving allows for larger bore sizes
– NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan
– Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for SNC cylinders and a head/base gasket set
– Replacement gasket sets available separately
– Upgraded cylinder studs and head bolts recommended
– Made in the U.S.A.