I have a mikuni hsr 42 with a force winder seems to spit every once in a while? thought it could be air leak but have gone over all bolts several times and made sure everything was tight. ???
What the other 2 guys said,also make sure your fuel is clean and free of H20.But I would look to the jetting.A #48 slow speed jet will fix you right up if you have a free flowing aircleaner and pipes.Also need to richen up the air/fuel mix approx. 2+3/4 turns from closed.Let us know what you come up with, Dave...
on my 42 mikuni ... i adjusted the adjustment screw in the plastic top above the metering rod on the accelerator pump.... It had viberated loose and didn't squirt enough gas early enough and made a hesitation in the acceleration of motor... carb is simple enough even in changing jets
signed....BUBBIE a friend of SIFIHD here in sunny arizona (HOT)