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another question on carbs..HELP...

  • Thread starter Thread starter Tnutz
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Tnutz

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WELL....got the g/f an 86 gs550 ef....Ran pretty good for a couple of weeks...idled good once it warmed up, drove nice...went to her moms yesterday, then went to leave, GAS GAS GAS...in airbox, in the exhaust....If noah was in there...an ark would have been built man....So...something stuck open in the carbs i assume???

the bike only has 14,000 km's on it...and i know the las towners never drove it much, so maybe they just gummed up.:?
 
First check the air filter. Check battery, Spark plug spark(weak, strong) Are the spark plugs fouled? You need to do a little tinkering before anyone here can help you. Also you carb floats might be sticking causing the flood. Turn off the petcock when parked.
 
air filter was dirty, but not enough to richen it up like that, spark should be good, it was running fine half an hour earlier, and for 2 weeks for that matter, battery is new. I thought these petcocks had no OFF on them, just prime, res, run.....
 
Check and see if there is gas in the vacuum line leading to the petcock.
 
looked empty before i pulled the tank off (it's clear and blue colored)
 
Apply vacuum to the small line that leads to your petcock and see if it sucks gas.
 
A mouth full of gas:-( If that happens the petcock diaphragm is bad and needs to be rebuilt or replaced.
 
okay, i'll try that first before we pull the carbs off....

So, how does this vacuum system work??? what is that line off the pet cock for?
 
the line off the petcock provides a vacuum from cyl 2 or 3, which opens the fuel line in the the res and run/on position. that means that when the engine is off the petcock is closed. prime just bypasses this function, allowing gas to flow all the time. good luck, i jsut rebuilt my entire fuel line from petcock thru carbs. it takes a while but a good job is totally worth it.
 
well my thoughts are either stuck float, or what you guys suggested with the pet cack.
 
well, pulled the plugs, they were fouled pretty bad, so i will get new ones i guess....It wasn't displaying any symptoms of running rich, it was running good when we drove it...no black smoke or anything. some around the ends of the exhaust, but the bike wasn't cleaned for along time...or almost never. so what should i look for?
 
well, the g/f told me she drove with the choke on for a while the other day, so that could have done it....SO...new plaugs, filter and oil/filter and i will tell ya what happens.
 
well, i put the carbs back on, put airfilter in, and new plugs, and it fired up, but it is fouling plugs....it runs okay when it's running, but when you shut it off and try to restart it after a while, it seems like it floods itself.....so that may be why they are fouling, cause once it's running and it's warm, it runs and idles good...AND after letting it sit, gas drips out of the vaccum line coming off of the airbox....(left side) it seems to run nice and not blow black smoke or anything once it's running...how do i add more air, is there adjustment screws???
 
If all your plugs are fouling there are a couple of possibilities. Float levels may be too high or you could have bad o-rings on the float valve seats allowing fuel to get by and overfill the carbs. If the vacuum line on the petcock won't hold vacuum there is a problem there. Vacuum pulls a diaphram back in the petcock allowing fuel to flow when the engine is cranked or running. That would only effect the cylinder the vacuum line is coming off of though. My bet is on the floats being set wrong.
 
well the petcock was leaking, so i put in and inline one, and no more problems starting now....i think it still runs a little rich, so in winte ri will take it in for a carb job i think (no garage)
 
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