Hi Mike,
The rules from last year were:
JR 1
Briggs flathead alky, Animal Gas, Comer 80cc driver age 8-11, 240lbs
It is my understanding at this time they will stay the same, but please attend the meeting coming sometime this month to know for sure (The meeting time, date and location will be posted on this website). Basically no additional weight is need to run the animal in the junior 1 class but it has to be stock and run on pump gas (They find that the alky flathead and gas animal are very close in HP).
Hope this helps
don