I bought a 1985 GS 550 LF. It had been sitting for a year, so battery was dead tank & carbs were dirty, clutch cable was broke. I fixed the clutch cable, cleaned the gas tank, bought a new battery and cleaned the carbs. Started it up and gas started pouring out the back of the carbs while it was running. It soon stalled out. I figured floats were stuck so tapped carbs a little but no change. I read my service manual and it states that the float level should be .77in to .85 in. I started with the .85 in setting, reassembled the bike, start it up and it still pours out. i lowered the setting 1-2 mm at a time, reassembling the bike after each incriment. It still pours out. I figured the float valves were wore out so i bought new float valve assemblies which included the needle vavle and the valve body. i installed those and reassembled the bike leaving the float level at .77 in Darn thing still pours gas out the back of the carbs. I then noticed 4 screws on the top of the carb on the intake side and they were screwed all the way in so i backed them out 2 turns. i get a better throttle response but gas is still pouring out the back of the carbs. What the heck is going on?Does anyone have any suggestions? thanks in advance allan