Not so sure that you would have to be concerned with;
running on Nitromethane and equipped with a supercharger
These items would be covered by other rules.
As for being concerned about the Big 5 putting big bucks into a machine and being better than everyone else, what do you think the current rules allow?
While the intention of the rule is to even the competition by using so-called "production" bikes, makes sense and gives the impression that a privateer can compete with the factories, it does not on any level.
First the most important area of a race bike is the suspension. I know everyone loves to talk about horse-power and needing more and more and that this is the path to winning races, but without properly tuned suspension all that power will go to waste.
But it's more than just the components of the suspension that are different (the stuff the factories use is nothing like the stuff that us humans have, it only looks similar) it's the hours and hours of testing to tune it for both different conditions and different riders. It is personally tuned to each situation. Most racers set it and forget it, never changing the settings, adjusting the sag, changing the oil or writing down hat works for each track. This is the area that the factories excel in.
Next up is the engine. These guys put a ton of research and development into these new four-stroke time-bombs. They are tuned to produce the most power possible and last for the one day of racing. (which sometimes they don't even make it through practice) These factories have 6 to 10 factory prepared motors sitting in cases ready to be bolted into their bikes in just a few moments.
The point is that they already have every advantage already. The fact is that can out-spend any privateer by a factor of 1,000 or more.
Believe it or not there is only so much power that can be extracted out of a specific sized engine. And there are compromises to be made. When you get top power usually you don't get easy to control and of course the opposite is also true.
Believe it or not there are small "mom-and-pop" shops that already do build the motors for some of the factories. These folks are their highest kept secret!!
The problem stems from the fact that the four-strokes cost significantly more when modified to compete at the highest levels of racing. This puts small manufacturers and "mom-and-pop" shops that could actually compete with them at a huge dis-advantage. Because they don't have the money to have 6 spare motors all built up....
Change just one aspect of racing.... equal displacement... then all of a sudden eliminating the homologation rule wouldn't matter. The small guys could at least afford to race. And possibly even compete and win.
Then it wouldn't be about "throwing" money at something to make it better, it would be about creativity, skill and thinking outside the box. It would open many more doors than it would close.
Man... I just looked up... sorry to ramble for so long!!