Your post brought back some old memories! In 1973 I had the Kaw. 500 Triple. Owned it for about 1 year. Had a few close calls since it didn’t handle very well! Like you said tho, it’s straight line acceleration was incredible. (IIRC in the ‘71-73 years, the Kaw. 750 Triple, which one of my riding buddies owned, the Honda CB 750 Four, and the Kaw. 900 were the only 3 bikes quicker in the 1/4 mile, in stock form, than the Kaw. 500 Triple in that era.) A long time ago, where have all the years gone huh?
The ‘70 and ‘’71 had CDI ignition (I think that’s what they called it.) The ‘72 had points.
You’re right about the frame. In a 60 or 70 mph curve, the frame would twist and this motion seemed to transfer to the front wheel which would wobble.
A gentle easing on the throttle would cure this condition. You sure didn’t want to do it too quickly.
I sold the 500 and bought an 850 Norton. Same horsepower but it handled like a dream.