42mm and 45mm Smooth Bore Carburetors

Description

The Mikuni Smooth Bore Carburetors are designed for performance engine builders seeking a high-performance carburetor for custom applications. Available in 42mm and 45mm sizes, these carburetors feature a rubber flange adapter that fits spigot-type carburetors and includes a clamp for secure mounting. The flange has oval mounting holes, allowing it to fit manifolds with 70-75mm center spacing. The 45mm version requires a custom manifold, and HSR42 cables, air cleaner, breather, and jets are interchangeable. A choke cable is included, except for P/N 426278, which requires the stock CV-type carb choke cable. Models from 1984-1989 require 90-95 cables.