We used to split tubing, so we could slide it over the upper tubes, and fit an x-brace across the front of the upper tubes, to keep the upper and lower clamps from rocking. We used industrial screw clamps to pinch the tubing (it was only split on one side....drove it on with a hammer before installing the upper triple clamp). The original lower clamps had a pinch bolt, but the old upper clamps only had the filler plug as the hold-down on the top end of the tubes. You could grab the front wheel between your knees, yank the bars, and reposition the upper clamp/handlebar alignment (back in the bad old days).
Hard to believe we survived, isn't it? Anyway, Noonan helped me out on some FZR1000 forks, so now I've gotta' get working on the frame. This is probably good, because I was going to have to weld the cracked lower end of one of the Katana lower legs (free bikes are never free, are they).
JimL