i don't mind the idea of GP derived specials using 4T motoX singles or twins, they're still competition engines afterall. More suited to 125 GP frames really though, those 4T motors are tuned to pull hard off low revs aren't they? So top end isnt that important whereas with competition road race machines its all about the top end! If CRF engines kicked out 90 horsepower then yeah, go hard with the 250 frames and swingarms, but they're like 55 horsepower at the crank for the hot 450s so it seems overkill using a 250 setup - needless strength and weight. It'd be good if someone came up with a multi-cylinder, high revving 4T motor that could make 250 2T power but still be small enough to be competitive on size and weight then i'd be all for it.... wait, didn't Honda do all that like 50 years ago and got banned for being too mint? Makes you wonder what we'd be riding around on today if someone had dropped a nuke on Italy in WWII ay?

Something like those Moriwaki MD250s would be great - i actually quite like the idea of those. I saw an article in a bike mag not long ago about a KTM competition 4T bike using their 250GP chassis but with one of their larger motoX engines in it. It looked superb but i can't remember what the details were with its motor's tune. Maybe someone should put a little turbo on one to get the peak power back up?
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After years of moaning about immigrants now i am one...