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GS650 not running right!

  • Thread starter Thread starter Anonymous
  • Start date Start date
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Anonymous

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Hi,I'm new here and have an'82 GS650GL..there seems to be an extra? vacuum hose under the tank with no where to plug it in...my friend and I put the bike back together yesterday and it runs ok up to about 5000 RPM then it starts cutting out until it gets back below 5000 then runs good again!....it could be fuel but I can't help but think it might be electric...any ideas?...Thanks....Ron..
 
The petcock vacume line.

The petcock vacume line.

I think thats the petcock vacume line. You should have two hoses from the petcock. The one closer to you is the fuel line. It goes to the supply T between 2 and 3. The other smaller one behind that goes to the #2 carb. Its the vacume that turns the gas on while the bike is running.

If the fuel flows while the tank is removed rebuild the petcock.

The other hose and wires under the tank are for the fuel level gauge. That hose just hangs down behind the engine incase the fuel gauge leaks.
 
There is also a drain tube on the underside of the tank for the fuel sending unit. Does not hook up to any thing. Not running right? I would check the air filter ( They WILL not run good at all with out the filter and air box installed) , all hose clamps. It probably needs the carbs cleaned and make sure to install an inline fuel filter.
 
Sounds like the extra hose is the floatbowl vent tube. Just route it under the seat or? It needs to breath, so don't kink it.
 
actually..there's a 3RD hose..it comes from the PRIME side of the petcock,and it doesn't hook anywhere..anyone know where that hose goes? ](*,)
 
3 hoses on the petcock?

3 hoses on the petcock?

You have 3 hoses on the petcock? Sounds like your petcock came from some other bike.

The two that are on my stock petcock come from the prime side, and point toward the back of the bike.
 
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