The KHS-016 is a genuine Mikuni HSR Series Carburetor Rebuild Kit designed for Mikuni HSR42 and HSR45 smoothbore carburetors commonly used on Harley-Davidson Evolution Big Twin and Twin Cam motorcycles.

Kit Contents
Top cover gasket and float bowl O-ring/gasket
Needle valve assembly and O-ring
Jet needle E-ring and washer
Throttle valve seal and pilot air O-ring
Fuel joint O-ring and accelerator pump O-ring
Accelerator pump rod boot and overflow hose
Replacement float bowl screws

Applications & Purpose
Compatibility: Fits Mikuni HSR42 and HSR45 carburetors (often cross-compatible for standard maintenance on HSR setups).
Function: Replaces heat-degraded and fuel-worn rubber seals, gaskets, and internal parts to fix lean running conditions, fuel leaks, and sluggish throttle response.