I suppose I'm sitting on the fence on this one..
I ride IT400C's in the Pre 78 class, so I know about the disadvantages a lack of suspension travel brings on.. But I ride the 76 model because I love them, not because I think it's the bike that will make it easiest for me to win the class.
And If I had I YZ-D, I'd probably want to run it as it came from the factory too rather than restrict it to 9" of travel.
But in all honesty, I can't see any point in changing the rules that are obviously working in a class that enjoys so much popularity.
- Run a Pre 78 bike at more than 9" of travel in club days if you want - it's the way it happens now.
- If you want to run a series of events, but don't agree with the MA Pre 78 - 9" travel rule, then specifiy in your Supp Regs that you'll be running Pre 78 as a 10" or 'As it came from the factory' class. That's what the Supplementary Regulations are for. As long as it's not a State or National Title event, and there's no safety issues in the Supp Regs, you can run your events to whatever rules you want.
- And if you're keen enough to race your Pre 78 bike at a National or State Title, then be prepared to restrict the travel to meet the GCR's...
My $0.02....