Billy,
Like you, I feel that the 3 wheelers would have evolved to a certain extent. How far, we can only guess. I also agree that the quads were never really developed at all after introduction. They stayed almost the same throughout their lifecycle. You can clearly see the difference in technological improvemnt on the 3 wheelers simply by comparing them from 1981-1986.
Huge difference! There was more development within these short years than any of the quads. There seemed to be some resurgence in factory involvement up until last year, with a few riders actually receiving quads, parts and even some financial support. Even with the recent support, it didn't come close to what we became used to making/winning at the races back in the eighties! It appears that ATV racing is once again "on it's own", and to be honest, I just don't think 4 wheel racing was ever as exciting as 3 wheels! I feel that spectators found more excitement watching 3 wheelers as well.