What else uses fuel on my 650?

[tom203]

When you removed tank for petcock, you had coils in view!
But after dying episode, if playing with choke/throttle starts bike, it's unlikely to be an electrical problem. Did you check petcock for correct operation after replacing it? make sure tank vent is clear?

 

[MisterOh]

the petcock seems to be operating perfectly!

um.. tank vent? man i have a lot to learn... I'll probably know what you're talking about, but I just don't know what everything is called. I just know what they look like...

edit: wait you mean that one tube leading from the petcock to the outside air? how do I test if it's clear?

 

[tom203]

"edit: wait you mean that one tube leading from the petcock to the outside air? how do I test if it's clear? "

Outside air?? Hopefully one tube from petcock leads to carbs to deliver fuel and another connects to #2 carb to supply vacuum to operate petcock (in "on" or "res" ).
Gas cap has small hole that lets air in so fuel can leave tank-

 

[MisterOh]

Yes, I have the fuel line from the petcock to the carbs, the vacuum line from the #2 carb to the petcock, and then this random line that goes nowhere in particular

Oh yes, the vent for the gas cap works fine

 

[BigD_83]

Yes, I have the fuel line from the petcock to the carbs, the vacuum line from the #2 carb to the petcock, and then this random line that goes nowhere in particular

Oh yes, the vent for the gas cap works fine

Can you take a picture of the random line so we can get you on track? Where is it attached? There should only be two line (vacuum and fuel) off of the petcock.

I can't remember, does the '82 have a fuel gauge? If so, there is a fuel sending unit overflow hose that attaches to the right underside of the gas tank, and is about 1.3m (4 feet) long.

There is the engine breather hose that is a little wider and routes over the carbs and back to the top front of the airbox.

Then there are two breather hoses that attach to the carbs. One is on the left between #1 & #2 carb, and the other is between #3 & 4 carbs. Those route up and out, over some grooves in the top of the airbox

 

[MisterOh]

oh boy, i'm an idiot. that was indeed the overflow hose and it's not attached to the petcock. where is it supposed to go?

the 82 does have a fuel gauge.

thanks for the advice on where to put the hoses.

 

[BigD_83]

It attaches to the spigot on the right underside of the tank. It's pretty obvious where it attaches there. I don't actually have one installed at the moment, so I'm not sure how you will want to route it, but eventually it is going to come out somewhere on the swingarm, where your air filter drain hose goes.

There is a diagram of the hose and cable routings somewhere deep in the service manual.