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Mikuni HSR45-5 Performance Carburetor Easy Kit

By May 30, 2016General Posts

Mikuni American’s popular HSR42mm Series Smoothbore Carburetors are available in easily installed “Easy Kits” for all late model Harley-Davidson and other American V-Twin applications. Included are kits for 1990 to present 1340cc Big Twin engines, together with 1994 to present 1200cc Sportster and Buell S2 models. HSR42 Kits come complete with a properly jetted Mikuni HSR42 carburetor, installation instructions, and works with your stock throttle cables. Included is a special adapter that allows you to retain your stock airbox or use the higher flowing Screamin’ Eagle performance filter kit for an additional performance gain.

unnamedMikuni says the HSR42 flows more air at full throttle to produce more peak power than other carburetors with bigger venturi bores. While at smaller throttle openings the Mikuni’s smaller, yet higher velocity flowing venturi, together with its advance fuel metering system provides a stronger overall powerband with improved ridability. On a stock engine without any other modifications you can expect the HSR42 Carburetor Easy Kit to provide a significant 10% increase in power and torque, and up to a 25% increase in power and torque when matched to a higher flowing intake and exhaust system, Mikuni says.

Mikuni HSR Carburetors and their Performance Features, Tuning Components, Replacement Parts and Rebuild Kits are available from Mikuni Dealers and Distributors in the USA and Worldwide as shown on