Question about 1984 Suzuki Gs 550 L

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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

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  • Suzuki Master
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Gas pouring out of the carbs means the float pin are not sealing in thus the over flow.
Go a little down thn .77in , best would be to bench set them.
Take a pipe say from the tank to the feed pipe of the carbs (best would be to remove the tank and place it higher on your work bench to get the gravity flow to the feed pipe of the carbs)
Allow the flow to the carbs and monitor the over flow, see which carbs over flow, remove the float bowl and reset the float and let it go a little less thn .77in, refit the bowl and retry the feed in and recheck..you will come to a point where gas wont over flow, open the bowl and see the level of the gas , it should be covering the jets, but remember that since you will have the float bowl out the gas will show low as when its submersed, the jet stem in the float bowl pushes the gas level up so dont get mixed up when you see the level low , i am sure you will be able to judge it for yourself.
I had the same problem in myYamaha(seca) XJ750R !981and finally managed to win over the problem going over it the way I explained.
Hope this helps! Good luck.

Posted on Jul 14, 2009

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Posted on Jan 02, 2017

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