94-06 Sportster, 97-01 M2, 97-98 S1, 97-98 S3
Improve starting, rideability, power and torque. The adjustable accelerator pump and smoothbore design combine to give a big increase in air flow over the earlier ‘HS40’ for excellent throttle response in any riding situation. Other features include a two-piece throttle slide that rolls on stainless roller bearings, a lighter throttle return spring, a low-speed air screw, and an enlarged needle valve and float bowl. All kits are specifically designed for each application.
High-performance kits mount to stock intake manifold and include the carburetor, adapters, air cleaner cover (where necessary), and detailed installation/tuning manuals.