Which nation has the most world titles?

The litre bikes would have been helped more so by the SBK increrase, but of course 990 technoligy is helping develop road bikes, too.
I think Honda made a bid to pit 600cc prototypes against 250 GP bikes, which sent Aprillia apeshit, because Aprillia are poor Naturally, they stayed 2 stroke, for now.
A properly developed 600 prototype following in the footsteps of a 990 would absolutely kill a 250 2 stroke. So I don't think it's a good thing. Sure, it could re-establish the class as a real world championship and not just a path to motoGP, but, like the 500/MotoGP swith, things would get costly. Very costly. The healthy 250 grid would be reduced dramatically. A lot of riders and teams are in 250 because they can't afford to move to motoGP. If 250s went 4 stroke, where would they go? 125's with it's age limit and possible move to 4 strokes too? Overall, I think two strokes will become a thing of the past. In the real world (Road bikes, power equipment, ect.) They're inneficcient, dirty, polluting fast wearing bits of machinery. But in the racing world thaey have a real purpose as cheap, fast and very powerful engines.

This has been discussed before, obviously 250cc GP bikes have no relation to road bikes, not even Aprilia is making 250cc road bikes (2 stroke) anymore.

The only reason why they keep this category (and 125cc) it's cause it's cheap to run.

The logical substitute would be 600cc 4 cyl 4stroke engines, but if they are prototypes, the cost would be HUGE, we would be talking about 25K rpm engines, lots of F1 tech in there (F1=EXPENSIVE).

The other idea is to use road bike engines (CBR, R6, ZX6R ...) as a base and only allow certain changes, but that has already been invented, it's called Supersport and Flamini bro's own the rights.

Aprilia has recently shown the succesor of the RS250 road bike, a 550 V twin (derived from their MotoX engine) 4 stroke. It could be a possible substitute for the 250cc category.

But anyway, it's not going to happen anytime soo because the current 250cc rules contract runs until 2011.

I didn't know how long the 250 rules ran for teo, are 125's the same? One thing you can be sure of is that two strokes will become extinct eventually and I'd have my money on 2011. I wonder how that will pan out?

I think 125cc will last longer, 250cc is a decadent category in most countries it's been cancelled (though in Japan it's still a powerful national championship).

But 125cc championships are active in most countries and I don't see any sign of them dissapearing, there are 125cc road bike replicas, which are making money for the manufacturers, so these may last longer.

Maybe instead of ligthly modified supersport stlye 600s they should have heavily modified 600s that are almost like 990 prototypes but more affordable becase they're based on a real production bike.