Like the In an effort to reduce costs and level the playing field, the new Moto2 rules are heavy on the list of items not allowed and light on what is permitted. The engines will have a maximum capacity of 600cc, no more than four pistons, will have capped rev limits, no pneumatic valves, no variable valve timing or lift, no variable-length inlets, no direct fuel injection, and must use internal c...

Like the In an effort to reduce costs and level the playing field, the new Moto2 rules are heavy on the list of items not allowed and light on what is permitted. The engines will have a maximum capacity of 600cc, no more than four pistons, will have capped rev limits, no pneumatic valves, no variable valve timing or lift, no variable-length inlets, no direct fuel injection, and must use internal components manufactured from an iron-based alloy, pistons from an aluminum alloy and crank cases and cylinder heads cast from aluminum alloy as well. Check out the complete list for like a dozen more things engines can't have.

Three or four years ago, it would have been easy to say that this basically amounted to a production 600 supersport engine. Not any longer. Take the 2009 Yamaha R6 for example, it uses variable-length inlets and a ride-by-wire throttle, its engine wouldn't meet Moto2 regs.

So what will power the Moto2 bikes if not production engines? We expect the factories to use the knowledge they've gained building and tuning their current 600cc engines to produce bespoke units based on current thinking and practices, but shorn of fancy high-tech features. They'll obviously be in a racing state of tune, so expect 20bhp or more than the current 120-130bhp production 600 engines. Just like the CBR-based GP6, those engines will be housed in prototype chassis -- don't rule out steel trellis units, they're extraordinarily cost-effective -- running top-of-the-line suspension. With a minimum weight for four-cylinder machines set at 135kg, the Moto2 bikes will perform vastly better than any road-going 600, but 100% prototype GP machines these ain't.

The one saving grace of this technological dumb down is that it could lead to incredibly competitive racing. Just like that currently displayed in World Supersport and Superbike. In fact, come to think of it, we're rapidly beginning to care about those two series much more than anything organized by Dorna.

via Motoblog