Don't overlook the rear swing arm pivot points.
That was the point of mentioning the H1 Kawasaki, or 1968 500 cc H1 Mach III. Kawy triple.
You have lived a sheltered protected life if you haven't wrapped your balls around one. Not one of the redesigned later ones. The were still horrid, but better.
My first trip up a twisty canyon led me to find out you could throw it into the first sharp left, but couldn't force it up and over for the sharp right that followed.
Speed wobbles aplenty. REALLY glad there was no traffic. Came up on the pipe and produced power instantly. Oh yeah, you has better be up on the bars if you wanted the front end to come back down.
The rear frame twisted like a mad whore. The swing arm bushings were made out of bubble gum.
Fun toy.