91 750 with new exhaust and has a loose conection some where

[bta2997]

I've read a guys post where his 1995 has a headlight kills witch to give more power to the starter, my 1991 doesnt have that feature it cranks with the headlight on. Here's the thing, if I shake the bike side to side it will click and headlight will turn off and on. I believe this is why it won't run longer than a few seconds. I guess the headlight is tired onto the coils. If Anyone has an idea how to find the loose connection so it will ride again, I'd sure appeciate it. Thanks guys

[ChandlerW]

I would start with the connectors under the tank. I have a loose connection under my tank that kills all power to the bike. I wiggle the connections and the problem resolves itself. Try that first.