OVer my time of working with lots of different carburators on dirtbikes. I ran into a problem with the excel v I picked up last year. I got it running with the original butterfly carb but wanted a slide on it. I bough a mikuni Vm44 carb and rejetted. I had the same problems with both carbs. The needle seat and float was bench set and check just by blowing through fuel line. But everytime I go to run the sled I keep dripping gas out the overflow. I cant stand to ride it becuase it reeks of fuel. I have fuel filters on it and a external airfilter running through the airbox. The only thing I can come up with is that the vacum fuel pump was replaced and the pressure is blowing the needle open. But then I come back to the fact that me blowing hard through the line can't blow the valve. I would appreciate any advice. Thanks very much.
Yamaha 1979 Excel V 540 Fuel Help
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