Smoke from under tank.

[Scudder]

I'm mentioning this here, now, because I've yet to be able to take a look at my sons 1978 gs1000e. He described to me last night over phone, that there was smoke coming from under the tank after he took the bike out for about 20 miles for the first time in several months (It's 70's in Chicagoland!) Sounded like it could be a detached breather hose to me, however I'm not ruling out a slight gas leak around the petcock area. I have some photos he sent me that show where the smoke is coming from under the tank. Seems to only be coming from the left side.

I rode the bike earlier before the smoke and I didn't notice anything, but after he rode it for awhile longer the smoke started rolling out once he stopped the bike. He said the bike ran fine and the smoke didn't affect the way it was running.

Any ideas before I take a look at it on Friday?

http://i1127.photobucket.com/albums/l624/scudder2/smokingonJoshsbike.jpg

http://i1127.photobucket.com/albums/l624/scudder2/2012-03-13210123.jpg

Scudder

[7981GS]

There is a large plug about mid-way under the tank that likes to melt.
Several people here have posted pic's.
Check ALL of the connectors under the tank and clean them!
Then apply Dielectric grease to the connections.
It may be too late and you will have to replace that plug if it is melted together.
Either way... CLEAN ALL OF THE CONNECTIONS!

Eric

[Scudder]

Anyone have a picture of the rubber plug? I would be able to tell what's going on until Friday and I'd like to get an idea of what I'm dealin' with prior to starting.

Scudder

[7981GS]

It's a plastic squareish plug and it shouldn't be hard to find as it is dead center under the tank and black from burning/melting.

Eric

[Scudder]

Ha! I'll follow the smoke.

Scudder

[7981GS]

Sorry, I miss-typed seat instead of TANK.
It WILL, unfortunately, be obvious.

Eric

[Nessism]

Pull off the gas tank and find the source. Could be the breather hose pulled off.