Petcock/tank outlet relocation

[1034am]

I am changing a CF Moto V3 to a V5 and the new gas tank won't fit due to the gas outlet fitting is in the wrong spot. What's the best way to remedy?
I was thinking of cutting out the fitting (w/some of the sheet metal around it) then either bolting or welding it to the new location. If I bolted in place, could I tap into the tank metal or would I need to back up w/nuts?
Think most body shops could do this?

[Big Rich]

It's actually a pretty complicated thing to do. I've never seen a petcock swapped over using bolts, but I couldn't imagine any amount of bolts sealing gas in.

As far as welding it goes, I have seen that quite a few times. Obviously tank prep is HUGE when it comes to welding. You'll have to call around in your area to find out who is willing to do it though.

[yamahonkawazuki]

This is true. I've w3ld3d a fuel tank before. Made me VERY nervous. Since the explosive nature of vapors.
Aaron

[1034am]

Tank is really empty, barely even a smell.
I've tried welding before w/limited success, so that's why I was considering bringing to a bodyshop.
Wondering if I take a Suzuki style petcock and try usung self-tapping screws (w/lots of sealant!) If they're large enough, & w/thread sealant, would it be strong enough for a little 250cc street bike???

[Big Rich]

There's a process to welding gas tanks. Purging the fumes is the first step. The other problem is how thin the steel is - a normal welder will burn right thru it. Another problem is getting a good seal at the welds - I personally have met 2 people that I know can weld a tank.

I'm really just saying it's not easy. And any business that isn't 100% sure they can do it will refuse to do it because of liability issues.

[yamahonkawazuki]

indeed. i just got lucky the one time i tried. a pinhole gap  and youd have a weeper.
Aaron

[1034am]

I have my car mechanic working on it, should know if it's good next week. Thanks for the tips - I relayed them to him.
Fingers crossed!

[Joolstacho]

Bit late now, (just noticed that this thread is a bit old), but I would: cut out the existing outlet, and silver-solder a brass patch over that hole, and then use a similar method to attach the outlet to it's new position.
Tank steel is very thin and takes a REALLY expert welder to weld it without blowing holes in it.
That's why silver solder or brazing is 'the go'
(IMHO!)

[The Buddha]

I know of several people who'd be able to weld that tank in their sleep. But I am in Nascrap country.

Fumes schumes - when you know its gas free (after several boiling water rinses) stick a match in it. If it doesn't burn up, you're home free.

Cool.
Buddha.