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flooding

  • Thread starter Thread starter bigfreakinchevy
  • Start date Start date
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bigfreakinchevy

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Patience is wearing thin. Just rebuilt the carbs on my 1980 gs550e (bs32ss) all new o rings, basket dip, yadda yadda yadda. Intake o rings... (Bike ran "ok" before the carb rebuild.) Fired it and ran sweet for about 10 sec then immediatley start flooding after the bowls filled to the point i had gas pooled in the air box. I took the carbs off, bowls off, figuring the float adj was incorrect but it was good, also checked the float valves by pulling them and blowing thru them and pushing them closed ever so slightley. They were all air tight. Then i figured the floats may have encountered a puncture while on my bench...nope . Soo im really at a loss now, i havent a clue.
 
Did you remove the bowl gaskets when checking the float hts? Are each sides of each float set the same? Are the valve seat tight and are there gaskets on each one..the gasket counts believe it or not. Did you use a piece of clear tubing to actually view the fuel levels in each carb?? Sure you got the right numbers when you set the float hts..double check your info??? any of the floats look like they are tilted off to the right or left when you look at them..straight up and no lean is how they should be so they dont accidentally drag on the carb cavities.
 
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Fill me in on the tubeing trick, and i checked again and again the proper adjustment. The book says .84-.92
 
You puy a piece of clear tubing..like fish tank air line..on the drain nipple when the bike is running and hold it up along the bowl and SEE where the fuel level reaches in the bowls..should be about 1MM BELOW the rim where the bowl and bodies come together. I say "ABOUT" but youll need to look in a manual for the exact numbers. Line on, start and idle, open the drain and look.
 
What carbs do you have on there?? VMs or CVs. Guess that would have been a question to ask. Stock 80s are supposed to be CVs.
 
Cv bs32ss
IMAG0224.jpg

Useless picture but the only one i have at the moment, i will post some twm.
 
Cant see the pilot jet holes, but they have the rubber plugs in them? What do the bottoms of the bowls look like..that nut??
 
Yes they have plugs, i will take more pics tomorrow. I followed the step by step on bikecliffs page. Everything went together the way it came off except with new orings and bowl gasket
 
Man..I cant think of anyhting that would cause that if youve been that thorogh and methodical..the only thing I would do if it were mine is INCREASE the float ht by 1 MM on each carb just to see if a taller float height shuts down the fuel faster when its running??? I did notice you used the SAE decimal declaration in your post about what they are set at. Maybe you wanna recheck the conversion? Not saying you did anything wrong..just saying double check everything that could have gotten thrown off.
 
The book actually gives the SAE spec on the float bowls as well as metric. And yes moving the float bowles is the ONLY thing i can think of. If that doesnt make a difference th.en i give up. It makes no sence to me how this can happen. The petcock is vaccum, so it took a while for fuel to even get to the bowls
 
It has the goofy petcock that has no lever or reserve. The rubber diafram looked a little dryed out but like i said it still took a while for fuel to even get to the carbs
 
I even checked the petcocks vaccum action by blow/sucking. I could hear and feel the diafram opening and closing.
 
Just did the conversions came up with between 21 and 23 MM as the range..anyone else wanna chime in on these numbers?? They sound a bit low to me???
 
page 21 of the manual on bikecliffs website states the float ht is 26MM or 1.02 inches..but they are showing the VM22 carbs too for a 80 550. If i remeber right the CVs came in on the 80s and the VMs went up to the 79 models. Confusing.
 
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