Mikuni HSR series flat-slide pumper carburetor, 42mm bore, spigot mount.
This is a great carburetor for Harley applications and many others where a flat-slide pumper carb is needed. Jetting: main jet N100.604-160, pilot jet VM28/486-25, needle jet series 723 Y-6 (p/n 784-430000-Y-6), jet needle J8-8DDY01-97, throttle valve TM42/08-3.0, air jet Blank, idle screw position left, air screw position left.
Includes long idle adjustment screw. Does not include choke actuator cable. Send us a message if you need a choke cable or a short idle adjustment screw.
NOTE: there are two different finishes available on the TM42: standard (natural) aluminum or polished aluminum. The standard finish is pictured here. Please select the desired finish when ordering.
Click here for Mikuni American Corporation HSR Tuning Manual.
