Can u race motocross with a honda crf100f dirt bike?

Question

NEED 2 KNOW!!!!!!!!!!!!

Answer 1

I live in California, US and every size bike has a class to ride in. So any dirt bike can race motocross. (This is ametuer racing of coarse, not professional)

Answer 2

There is no section for them where I am but I am in Australia so it may be different where you are.  

Perhaps state what country you are in as then if you are in America some of the guys with heaps of knowledge there will answer as they will know.