I posted a few days ago about taking off my gas tank to route wiring for my Stebel air horn, and after replacing the tank the engine starts but quits after the float bowl empties. It was suggested that the gas tank vacuum hose may have been kinked or off at one end (Thanks guys). I found that the tank end was loose and replaced the hose clamp with a stainless screw on type. It fired right up. Problem solved... until this morning when I fired her up to go to school. The idle was really fast (even for the choke being on) and by the time I got my helmet on my noggin she'd stopped running. On the way back from school in my 4 wheeled coffin I stopped and got a gallon of gas; perhaps my baby had run out. Not so. It will only start with the choke on and the gas valve at PRI. Moving to "reserve" or "on" immediately stalls the engine. Did I mention that she idles fast... real fast, maybe double the speed when normally choked. I think it fairly obvious that there is no vacuum to the tank but the line does not appear to be kinked or otherwise screwed up... as far as I can see. Which brings me to a couple of queries. Where does the other end of the hose go to. It disappears towards the rear tire and short of really taking stuff apart I have no way of knowing where the end of it is. Does it go to the carb? What part of the carb exactly? The canister? The Twilight Zone? My downloaded repo copy of Clymers is vague and the pics are not very clear. The hose in question is extraordinarily long; at least 8" too long as far as I can reckon. It curls and twists around below the carb and the rear of the block before heading up to the petcock. Is it possible that I have managed to find some other tube and connected it in error thinking that it was the vacuum tube? This tube that I've connected is covered in some kinda black plastic outer housing (a real loose fit) Stock carb, 3X3, (I assume the previous owner did the jets as well, but honestly dunno) really loud Yoshi connected to the stock (unfortunately) header. I need an anti-psychotic. Not being able to figure this out is driving me crazy.