gas cap opening modification

[Crunchybeard]

So i have a 1972 cb450 with the stock tank and wanted to change the regular gas cap (which i dont have and dont want to spend an ass load of money on) to something more modern like a flush mount gas cap(link below is what i want). i no i have to cut the original gas cap neck (if you will) and weld on the bung. my question is should i weld in the bung or braze it? also will there be any downside to doing this? imo there shouldnt be a downside cause im just switching out the cap, but any suggestions or information you can give me will be much appreciative!!!!


http://www.lowbrowcustoms.com/p3141/buy/m-c-parts/gas-tanks-amp-accessories/gas-caps/cycle-standard-custom-flush-mount-gas-cap-and-weld-in-bung/

 

[AlphaDogChoppers]

TIG weld is best. Brazing would cause too much distortion because the heat spreads out over a larger area. You could use a low heat silver braze, but I wouldn't use standard bronze brazing rod. I've tried it on gas tanks, and it just kinda messes thing up because of too much wide-spread heat.

 

[Titan performance]

Be careful welding a gas tank...........

 

[Crunchybeard]

awesome!!! thx for the info guys really helps

 

[Serizawa Tamao]

Apologies if this is the wrong place to ask this question, but I'm trying to swap my cap out too, I have an 82 Twinstar and I removed the old lock panel and want to swap the stock gas cap with a locking one. Anyone know where I can find one or what will fit the stock gas tank?