Standard Jetting Specifications Carburetor # Venturi Size High Speed Jet br / Low Speed jet br / Low Adjuster br / High Adjuster br / Spring Enrichener Type Needle Valve BN46-42-8002 46 150 120 1.00 1.5 80 gram Primer 2.5 p High performance Mikuni 46mm Super BN (SBN) R-Type ...Standard Jetting Specifications Carburetor # Venturi Size High Speed Jet br / Low Speed jet br / Low Adjuster br / High Adjuster br / Spring Enrichener Type Needle Valve BN46-42-8002 46 150 120 1.00 1.5 80 gram Primer 2.5 p High performance Mikuni 46mm Super BN (SBN) R-Type carburetors with extended throttle shaft. Features a viton tip needle valve to provide optimum pop-off and a primer-type cold start system (no butterfly choke) to increase air flow. - NOTE: These are aftermarket carburetors and may require modifications to make them work with stock linkage and fuel routing.
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