The Mikuni HSR flatslide carburetors deliver extremely crisp throttle response while providing an unrestricted bore for maximum flow.  Maximum flow allows your engine to reach its full potential so you can accelerate and pass with confidence.  An HSR42 carburetor bolted onto a standard Harley-Davidson motorcycle used with a Screamin' Eagle air cleaner can ADD up to 24% more horsepower over stock.  An HSR45 carburetor combined with the proper modifications can add as much as 30%!  And the HSR48 delivers the highest airflow and most accurate fuel metering for the most power and is recommended for experienced engine builders/tuners only.  These are the same carburetors included in all Mikuni HSR Total and Easy kits.  Available in polished or standard, select yours now before adding to your cart.

You'll enjoy many years of unbeatable performance and reliability.  They install quickly and easily using the OEM throttle cables and choke cable.  Dollar for dollar no one beats a Mikuni carburetor for performance, tunability, and reliability.

You can keep the Harley's factory look and fit while enhancing the throttle response, acceleration, power, and torque output.  Mikuni's flatslide smoothbore design with accelerator pump and slide roller bearing technology delivers peak performance across the entire powerband.  With Mikuni's accelerator pump technology there's no hesitation from idle to WOT. 

The Mikuni HSR carburetors are simple bolt-on horsepower for all Harley-DavidsonBig Twin, Twin Cam, Sportster, and Buell motorcycles.  For use with all mild to highly modified engines our carburetors come with extra jetting for fine tuning.  Select either a standard or polished finish now before adding to you cart.  Available for both Big Twins and Sportsters, you must specify your model above in order to receive the correct throttle cable bracket.  There is no additional charge.

Our carburetors come pre-jetted for immediate installation.  They are designed to work with the OEM throttle cables (1990-1999) and choke cable.  Tuning and performance specs have been developed over the years to suit a wide variety of conditions, however some fine tuning may be required to attain the desired combination of performance, fuel mileage, and drivability.  Extra main and pilot jets are included for tuning and additional genuine Mikuni parts and accessories are always available at low prices.  Alternatively kits can be customized utilizing your own jetting specifications.

WARNING : This carburetor kit will seriously wake up your motorcycle!

Please feel free to contact us with any additional questions or requests, we are available by direct line, IM, or email.  We are available for tuning and setup questions as well as continuing product support after the sale.