Unicycle rack for a motorcycle (the UniRack)

Step 4 Weld a vertical post to the top of the square box

Next, you want something to hold the frame to. So, take a piece of tubing and cut a semicircle on it. I used a dremal, which isn't the easiest way to do it, but works. Weld the post vertical, and test fit the unicycle to it with a bungee cord.