I heard of a few on Rockets. Generally nobody puts them on anything under about 700 pounds and is used solely as a cruiser. If you must do it stay out of the twisty roads or off the throttle if on the twisty roads.
Good luck, have fun, risking your life to save $100 bucks just does not equate to me. I would say "Please don't do that" but you have the perfect right to ride your own ride so I will shut up now.