We allow watercooled in our series on the West coast .We had everything from 85cc,
125cc to 250FS. We have a schoolboy kind of class as well for the 400cc for the 14-15 yr I think ? I know they made some changes this year, not sure on the ins and outs but we had a class that the Hybrids race that consisted of kids 12-15 yrs. My Daughter ran a "yahonda" in it for two seasons .lol
As far as the GNCC, I would ask others who run the series or shoot them an email.
They should also have a rulebook online ?
A stabilizer will def. help your lap times .
theres is some controversy on changing the Swingarm length .To eacn there own, we prefer stock length . Your suspension ,getting good power and tracion to the ground and a good stabilizer will make him faster- then add the power

thats my advice
