Joined Oct 2012
3K Posts | 725+
Crab Key
I'm afraid I'm not naif enough to buy your reasoning...
Aprilia losing interest for the 250 class knowing that it would soon be killed is a completely unrelated issue: of course they stopped developing the 2 strokes. What else were they supposed to do?
You assume that they would not have participated in a prototype Moto2 class, but that's just your own assumption and goes against what Aprilia themselves declared, which makes plenty of sense.
How do you you know that they would not have participated in a prototype Moto2 class, maybe even delaying their entry in MotoGP? A 500cc 4-strokes V-twin would have certainly required a modification of their existing 250cc chassis, but not a complete redesign.
As things rolled out, they naturally preferred to ignore the current Moto2 with Honda engines and concentrate on MotoGP. It's totally understandable.
They had three more years to run with the 2Ts. They didn't bother with a Moto3 design, instead they began shuttering the whole dept. Most of the main players left circa 2008 with some minor development continuing on the 125s (who shared cylinder design with the 250s). They were done with Grand Prix. Finito.
Piaggio decided to change to SBK as soon as rumours started on the Moto2 class. Only the CRT rules brought them back into the GP fold. And that was a dressed up RSV4. So no, they didn't ignore Moto2 to concentrate on MotoGP.
(Sacchi did have a go at a Moto3 under the IODA banner, but the engine was blowing up on the dyno and AFAIK never made it into a chassis)