Hey Desert Wolf,
You "might" run into something I had to deal with
when putting harley risers on my rocket.
I had to drill out the holes to accommodate a 1/2" bolt
instead of the smaller metric size that fits the Triumph risers and the Rivcos.
No big deal really, just know once you change, you can't go back...
Well, I guess you could theoretically if you can heliarc weld aluminum,
or wanted to trust helicoils to tighten the holes up.
I put 5" up and 5" back harley risers on mine and I like it better now.
Way more comfortable to me.
Heres a pic or two or three, of my setup,
Good luck with yours.
view from the captains seat.