PS: That was on my other (faired( bike - not the CB...I actually find the CB750 worse in the wind...rear end wwanders a lot in gusts. But I guess fairing design can be good or bad. I won't go on the CB750 if the wind is above 60kph.
Maybe check those swingarm bushings for looseness?
I often ride in high crosswinds, up to 60 MPH around here. They are quite common in the Spring and Fall. With the Vetter, it splits the wind, either from the front of side, and I get blown around much less than when on an open bike. The limit came one fine Spring day with 90+ MPH winds when I reached the crest of Rooney Road on Green Mountain on the way to work: I could not lean it into the wind enough to turn leftward, from whence the wind was coming! I ended up stopping, backing the bike up a bit, turned it to face the wind, then rode off again, laughing... The same day, I was walking at lunchtime to experience the then 110+ MPH winds on foot and walked up to a State Patrol car sitting on the side of the road, eating lunch, it turned out. The wind was coming to his left. I waved at him as I walked by and he opened the window (electric) to say something back, and the windshield of the car popped right out and flew into the field nearby, with his lunch! We laughed for almost 5 minutes, then I asked what he wanted to say: he'd forgotten by then.
If you ever cross Kansas in the Spring or Fall, be prepared: it can blow steadily at 60 MPH from the Northwest toward Mississippi across there. Each time you pass under a bridge on that I-70 trip, you'll change lanes!
