The eco-friendly argument was Honda ........ propaganda. Honda have always hated two strokes, and the switch to four strokes was very much engineered by them. In fact, two strokes is where the real advances are being made in cleaning emissions. In some marine applications, four strokes are being banned and only two strokes are allowed to be used. Also, if MotoGP is an R&D exercise, then all you would need to do is impose emissions restrictions (maybe better than a fuel limit, actually) and allow people to race whatever they wanted. You would soon see big improvements in emissions and power.
As for the brakes, they won't ban carbon. They may well impose a spec braking system, however. What they want to do is get rid of the price increases year by year. Basically, we already have spec brakes and spec suspension, with only Gresini the odd man out using Nissin and Showa. Guy Coulon said some interesting things to me about diversity:
"[font=Verdana, sans-serif]Sometime, or nearly every time, a rider like better to use the same thing than others, so that is why we have less and less [chassis] makers.[/font]"
[font=Verdana, sans-serif]Q: Which is why everyone is on a Kalex now. Because one rider, Stefan won , so it must be the Kalex, so give me a Kalex and I will beat him, is that how it is?[/font]
[font=Verdana, sans-serif]GC: Yes, this is exactly it. And everybody wants the same brake, and the same suspension, because if you have a different suspension and if you are behind others, it is because of the suspension, even if your suspension is working very well. [/font]
The riders are a big part of why we have spec equipment. They want the same as everyone else has, that gives someone a monopoly position, and they start to abuse that to make money.