HOw do you figure that ? if the bike is a designated 1975 model it is eligible - be it flow on or otherwise does not negate the fact it is a post 75 model..... All the flow on means is you have the option to run in PRe 75 should you feel like it even thought the model and bike is post 75. It was a class choice before the split came into place, manly so you could do the age races. Now it wont matter as you could in theory ride both the differant nats on the same bike as there is no class clashes --- Dont go confusing things.
Ross - Qld... TBA