Originally Posted by sailah
There isn't anything below strong enough to mount the bar like you describe def don't want to risk the oil pan or lower case. I'm 230#
I was'nt very clear lol, I did'nt mean actually mounting them to the cases like back in the day, mount them to the original rear set tabs on the frame like in the picture that Sanjoh posted, in addition run a brace or tube between them to make them a single peice with four bolts rather than two pieces with two bolts, should help spread any impact they may take in a crash or something.
That is if it's even possible without interfering with the chain routing or sidestand...well could modify the sidestand with a horseshoe to fit around the brace.