Brunson for some reason cant. see pics !!what did carb come of? I think if you get the right size and get set up properly they are hard to beat! ?? is what size should run do not want to big or to small. and then getting right slide and needle. and jetting. the reason I started the post was to see if any one had tryed to do this before ,Goerge might have idea what size should run on your motor. best of luck know it can be done. the snowmobilers switch from to tillys to mikuni not so much for performance just easer when get set up.