A few weeks back I bought the Givi FZ451 Topcase mounting arms, thinking that they would fit with the factory sidecase mounts (after all they are both made by Givi right?) Wrong. I thought about returning it, or selling it, but then a friend and I came up with a solution. (Yes. I know my workspace is messy)We made a few parts:We needed a bracket to allow the rearmost mounting point of the arms enough clearance on the sidecase mount. So we cut two brackets:Here it is attached to the arm:The front of the topcase arm fit perfectly in place:We cut some collars to mimic the shoulder on the stock bolt (that held the side reflectors):Voila! Both arms in place:Now these crossmembers to create a “rack” where the mounting plate can be fastened:Cheapo (seriously the quality of the bag is not bad at all) JC Whitney universal top case mount in place:Not too shabby:These lazy chubby bast***s did not help at all:Old Kawasaki Joke:I hope this helped you or inspired you to be creative in solving problems that often have the best of us cursing and throwing tools across the garage.