Motorcycle Repair: cb750 c 1981, overflow pipes, overflow pipe

Question
The carbs are overflowing. I dont know why.The bike runs great except during midrange after this developed, carbs has be cleaned and adjusted I lost,, any help?

Answer
The carbs were not cleaned correctly, or there is a small hole in the overflow pipe which can cause this problem.  You will need to take the carbs off, identify which one(s) are leaking, and ensure the needle valves are functional and clean, and ensure the overflow pipes are intact.  Good luck,  Jan