my dad needs to weld his exhaust bracket on his 96 gas gas, as it is electric welder, what will need disconecting on the bike? will it be ok just to disconnect some earths? thanks colly

I had to get a mate to do some welding on my bike.

We just disconnected everything we could find, and it was fine - maybe I was lucky - as mentioned removal is the only way to be 100% sure if you are not feeling lucky

pat

Make sure the ground strap of the welder has a good connection to the frame and get it as close as you can to where you will strike the arc. Current will follow the path of least resistance and wont spike anything on the bike. Unplug the CDI if it makes you feel better but ive done plenty removing anything.

If you want an experiment find a piece of steel and hook your ground to the middle and grab it at the end, now strike your arc at the other end...no problem. Now hook your ground to one end and grab it in the middle, strike your arc at the other end...whew tickles dont it.