Fixed the link - but does it have the lever on the other side ? pics don't show that side, only the vacuum line side. Grrrr.
I know a lot of people have talked about converting to 1 petcock, and effectively - my .02 on that.
Someone should try this - I have not, and I would not be able to say if it will even fit or not - and the gasket is different from the GS gasket - that's all I know. Will it fit - maybe.
K&L Supply Motorcycle Fuel Petcock Valve Assembly 18-4172 (likely a file photo - so likely its a completely different part)
https://www.ebay.com/itm/K-L-Supply-Motorcycle-Fuel-Petcock-Valve-Assembly-18-4172/352664806562?epid=171171766&hash=item521c75e4a2:g:SWYAAOSwL6Fc27Es
https://www.ebay.com/itm/2001-01-Suzuki-Intruder-VS-800-VS800GL-petcock-fuel-valve/254268507843?fits=Model%3AIntruder+800&hash=item3b339586c3%3Ag%3AdssAAOSw-fpc7ID5&LH_ItemCondition=4 - Likely the correct part - in which case its not useable - its not vacuum operated.
I suspect its not deep enough to get to the under side of the GS'es deeper frame compared to the intruders. However it would get 1/2 way there, and that's better than sticking in your hands all the way to the tank to fiddle it. Vacuum operated = you would rarely need to get in there, and will be able to use 1 fuel line and 1 vacuum line like the Intruder 800 that petcock belongs to.
Cool.
Buddha.