In BSB it's foetus racing (in the main - a few oldies in there), but that's because it's circuit racing, and the younger you start, the better; Moto 3 is a perfect entry class for kids who are still devoloping (mentally, physically, etc).

On the roads I agree it's not a place for youngsters (actually, what is the minimum age limit to ride the Manx/TT ??), but if the bikes were cheap enough to buy/run, and if a lot of road race organisers created a race for them, I think you'd see a fair amount of older riders wanting to race them. They'd be a lot less of a handful than a superbike/superstock bike, and a different skill/challenge to a 600cc; they'd be more akin to the riding style needed for a Supertwin, and that class gets a lot of entries.

If you look at the TT riders it's surprising the number who can ride a big bike well, yet they don't ride the smaller bikes that require corner speed, as well. So it would be a class that you could see a different set of names dominating it. Plus there's the attraction of racing a pure race bike, and all of the art of setting up that takes.

However, until they becomes cheaper to buy, and more importantly cheaper to run, I don't see many people wanting to lobby race organisers to create a class for them.

And please, no more superstock bikes - you can't really tell the difference between the Superbike/Superstock 1000 bikes, and the same would be true of Supersport\Superstock 600's. More variety would be good, and replacing one of the supersport races with the Supertwins, and then making the lightweight class for Moto3/125 would be good. Protects the Supertwin investment that everyone has made, but gives another different class to watch - just like the old days when you had the 125 and 250/400 races.