You'll never get this one! Take a whack at this ugly heap.
I'd give that one a bit of respect from the point of view that at least it's a "proper" four stroke i.e. a four stroke that plays on it's own strengths and doesn't try to act like a two-stroke.
Also bear in mind that they took on the 2-strokes with some dignity, 500 v 500, all fair and even.
I remember competing against a guy many years ago who run one of them on "dope" as we referred to it back then, it was some sort of methanol mix and he obviously had lots of engine work done as well. But when he nailed it exiting a corner it was like all hell broke loose, we were racing on fresh dirt/grass and the barrage of stuff from his back wheel was mighty. I was on a just freshly run in 490 Maico (lets you see how long ago it was although to be fair I was very young) and had no answer to the drive he had out of the turns, the corners themselves was where I had to try and make it up.
In short, if someone gave me one of them I could swallow my pride sufficiently to accept it!