needhelp im lost

x3 on the float issue..... Could be one of the needle and seat damaged or dirt imbedded in the needle on the rear carb. If the engine does idle, look down into that carb when running. Do you see any dripping out of the booster legs, you should not, fuel should be atomized so as not to see liquid. Also, don't know what your floats are made from, but could have a bad one that is not able to float enough to shut down sufficiently enough while running, therefore putting in too much fuel.

Just some thoughts.......