I've got a problem with a 1985 XL250r, i have been having many problems with the dual carbs. But i've eliminated as many problems as i can, but one remains; too high fuel level in the carbs. What happens is the fuel level will reach a good level, then slowly creep up until the level is above the gasket face of the carb bowl. The carbs won't overflow though for whatever reason. If i try set the level any lower, no fuel will enter the carb bowls at all. I've renewed the floats and needles. This problem happens with both primary and secondary carbs. The bike runs great if i shut the fuel off and let the level drop, so the fuel level is definitely a problem. Any insights would be appreciated.