When I made mine, I made the uprights 6' tall so that the stand can be used for more than just the triple tree. I use it to hold the tank up and as a place to hang my mercury sticks when doing the tbs.
While at the Home Depot, my better half suggested that 1.5" pipe looked much more substantial for not so much more money, and wouldn't I feel the idiot if I went cheap and my beautiful bike ended up on the floor?
So I made mine from 1.5" pipe and after it was assembled I tried to knock it down while hanging on it. I'm not as heavy as the bike, but the bike doesn't move on it's own either.
Now if only I had a 19mm hex wrench to pull the front axle...
I had the whole back end out of it this past winter doing maintenance. The pipe stand I made kept it supported for many days. Hanging from heavy duty tie down straps (the kind with ratchets) that were threaded through the frame cross member that runs between (under) the rider and passenger seats.
I still have the center stand on here, but it came off later too.