Engine

Active filters
Covers the gap between the transmission top cover and the engine cylinder for a finished look. Installs quickly and easily. Durable polished finish.
Smooths the transition from the cylinders to the engine cases for a clean finish. Easy installation with basic hand tools.
Direct-fit oil cooler cover that installs like the stock factory cover for a quick bolt-on upgrade.
Steel-base, one-piece crankcase vent filters. 50.8 mm (2") diameter; 38.1 mm (1½") height. Available with or without mounting stud.
Kit for mounting rotors to hubs; sturdy construction and made in the U.S.A.
Secure, precision fastener for motorcycle control assemblies. Made in the U.S.A.
Complete rotor-to-hub kit for single-disc applications. Two kits required for dual-disc setups.
Complete bolt kit for primary and derby cover service. Made in the U.S.A.
Durable fastener engineered for secure attachment of control assemblies; precision fit and corrosion resistance.
Durable nylock nuts that lock under vibration for dependable suspension fastening.
Complete motor set for Big Twin: includes side covers, lifter base timing plug, inner primary mount, and front/rear motor mounts. Made in the U.S.A.
Hardware set to secure handlebar levers and switch housings. Made in the U.S.A.