Who says you can't ride two-strokes on the street!? You can't ride -new- ones, b/c there aren't any... there are some -relatively- new ones... if you want to import them (not impossible, just difficult).
Yeah, I know what you mean.. just kidding.
As a two-stroke fan, and owner of same (RZ350 and TZR250), I have to say that not much comes closer to 'real race' machinery than your typical mid '90's two-stroke repli-bike. Two strokes are such simple machines, outside of porting and materials, the engines are largely the same between race and street (configuration wise). You want something close to GP tech, get a two-stroke!
It's funny... when you have one type of bike that dominates a race class (Ducati in WSB, Honda in GP500), everyone gets bored and stops caring so much. Yet, when the racing comes down to setup and rider, and the races are close, everyone then says "oh drat... these bikes are all so close, we need to muck it all up again!"
No one is ever happy it seems. Give them a dominator, they get bored with the winner... give them close racing... they get bored with the machines and claim that it's stagnant.
I always thought the goal of the racing sanctioning bodies was to level the playing field as much as possible. They have that now! Adding big $$$$ 4-stroke prototypes is only going to result in Honda (deep pockets) dominating yet again....the grids will shrink w/in 5 years after everyone else has spent themselves into the poor-house. As well, forget about any privateer or even semi-privateer teams... like the ones on the v-twin Hondas. That'll dry up quick fast and in a hurry.
Secretly, or not so..., I hope KR Sr. keeps with the KR-3 and sorts it out and hands it to '4-stroke-Inc' on a platter. I do think the addition of 'diesels' will be cool, don't get me wrong... but I think in the end the result will be the same, and it'll just cost a TON more.
If somehow a good does of 2-strokes keeps racing outside of just the next couple of years, I think things will be much more interesting. Hell, once the smaller teams are broke on 4-strokes, they may well go back to 2-strokes.. it may even wind up in the furthered development of 'clean' 2-strokes and get them back on the street! (Honda has 'clean' 2-stroke tech. already, they're sitting on it though.. the bastards!)
A man can dream, can't I!?
Ok.... off my soapbox now!
-James