Banjo bolts.

I am thinking of fitting one of those banjo bolts that have the brake light switch incorporated into it, but I am not sure of the correct thread for my bike. They seem to come in two sizes M10 x 1.25mm and M10 x 1.00mm.
Does anyone know which is the correct one, my bike is a 1981 KZ1000 J1.

Just did a quick web search and found not one site that lists the thread size. Using the newer part number, I did find that it is used on a crap load of models--

www.megazip.net/zapchasti-dlya/kawasaki/bolt-921530627

Instead of wasting time on the interweb, i should have just gone to the trusted source, the fsm.
From page 1-11

Pretty sure that there was another thread similar to this not to long ago.

I'll see if i can find it.

Later, Doug

Thanks for that Texas, you're a star.