A member or two has mounted bicycle pedals on their Rebel, but I can't find the thread showing how they did it. It would be costly, but you may have to have adaptors made in a machine shop if you can't find any commercially.
Keepin' all the left over parts. Gonna use 'em to build another bike!
kuryakyn might have some adapters, but youd want to get them with their pegs. theyre a little pricy but very high quality and great customer service! I actually measured the mounts for my brackets on my 450 and they promptly responded with a set of adapters that may work with mine! send them a dm with the dimensions if they dont have one listed that fits!