Evo carb
#11
OK so knowing that it did run with that carb setup I would have to say you are getting too much air(lean) with the choke off. I would reset the carb to original factory settings on the screws and try it there. Also agree with texashillcountry about checking the carb to intake seal as if there is a poor seal then you are getting unmetered air which will cause a lean condition. If everything is sealed up good and you start with factory settings it should start. Then you can adjust it from there. That is unless you have issues inside the carb still.
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Join Date: Sep 2007
Location: Bluffton, South Carolina
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If you don't have a bucket with carb cleaner to dunk it in, go to lowes(etc) and get a clean one gallon paint can and some lacquer thinner. Put the lacquer thinner in the paint can and submerge the disassembled carb in it at least overnight. Be sure to have all the rubber parts removed. The idle air screw has a needle with a small spring, washer, and little o-ring and all those parts have to go back in the same order. Also where the needle that is in the slide goes into the carb there is a silver colored needle jet. The inside of it has a square end and a radiused end. The radiused end goes up so the needle can go into it. Do not put it in the other way or the carb will not work properly. Do not put the slide in the cleaner. Do not cut the spring or drill holes in the slide for street use. Use high pressure compressed air to blow out all the passages. When you reinstall the idle air screw make sure the spring, washer, and o-ring are installed in the proper order and gently screw the needle all the way in and back it out two full turns.
The overflow is probably caused by a bad float needle, they have rubber (viton) tips that get hard over time with today's fuel.
Hope this helps.
John
The overflow is probably caused by a bad float needle, they have rubber (viton) tips that get hard over time with today's fuel.
Hope this helps.
John
Last edited by miacycles; 08-08-2013 at 05:41 PM.
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