Mig Welding Motorcycle Tank?

[ncologerojr]

I'm working on a cafe project and I would like to narrow a portion of my tank. However I do not have a tig welder, only a mig. I am by no means an expert welder, but I have a good amount of experience welding thin steel with good results. It is a cheap tank so I have considered mig welding it, and then following with a tank sealer. Anyone have any experience with this? Thanks in advance for any advise.

[jlrussell4]

Hi Nick,

Why not? The mig weld will take a little more effort to clean up, but should work fine.

Be careful welding and cutting around the used gas tank.

[rdupree]

I recently repaired a tractor fuel tank. This tank had been empty for years, so no fumes present. I cut the end and bottom of the tank out, sandblasted the insides, and rewelded with mig. Sealed the tank afterward, and there were only a couple of small spots where the sealer seeped through.

[jag2be]

I made a aluminium gastank for a truck and welded it first time with MIG,it was full of small leeaking pinholes.But this was without sealant.
Restarted all over with TIG and only has 3 pinholes.
And alot faster.