[michael_1234]

i've got an 1981 GS1100 and my crank is filling with gas. any suggestions as to what is wrong?

 

[87gsxrnut]

Carburetor needle valves worn out. Or the main jets are real dirty, not allowing the valves to shut all the way.

Your bike has the stock petc0ck, right?

- Nut

 

[michael_1234]

i put an aftermarket pet**** in it. the stock one was stuck on the prime position

 

[87gsxrnut]

That could be part of your problem too. Sometimes they dump more gas into the carbs than they were designed to handle. If the needle valves are worn, and you are using a Pingel, or another vacuum-less petc0ck, then the gas valve will keep dumping fuel into the carbs after the motor is shut off. Normally, the carburetor overflow vents are supposed to stop this, and allow the fuel to dump on the ground. but sometimes they don't.

- Nut

 

[michael_1234]

so your suggesting i change the needle valves? i have had the cards apart a few times before, and they look ok, i dunno if it is something u can see if they are worn?

 

[87gsxrnut]

Sometimes. You will see a "ridge" on the valve tip at the point that the valve meets the jet.

Other times not.

- Nut

 

[michael_1234]

they look good, but i guess who's to know

 

[87gsxrnut]

Oops, emulsion tube, not jet. D'OH!

:roll:

- Nut

 

[michael_1234]

ok well i'll look into it. thanx a lot. i mite be back

 

[dirtyfingers]

No No NO. Emulsion tubes, needle jets, and main jets, are fuel metering devices, all wrong. FLOAT VALVES are what you are talking about, these stop the flow of fuel when the float bowls are full. If not absolutely perfect will allow fuel to seep past the seat, filling the crankcase with gas. BTW get into the habbit of turning the tank valve off when you park it, if its not a vaccum operated one.