Just take the bike out of the race entirely. Declare a year in advance that the bike will be XYZ model Q so people can train on them, and the race maintains custody of all race bikes, spares, etc.
It's already a money-competition to see who can buy the best super-bike. Yes, you have to have a minimum weight, but that just means that you can take a superbike and spend the extra weight applying aerodynamic fairings whereas someone else has to spend that weight on their frame or whatever.
Just take the bike out of the picture entirely. You ride this bike. Or one of these three models. Or whatever.
It's already a money-competition to see who can buy the best super-bike. Yes, you have to have a minimum weight, but that just means that you can take a superbike and spend the extra weight applying aerodynamic fairings whereas someone else has to spend that weight on their frame or whatever.
Just take the bike out of the picture entirely. You ride this bike. Or one of these three models. Or whatever.