Talk to kevin. Notice how it says in the rulebook that certain models will be allowed.
By the way, I ran a VFR400 for 2 years and won a regional championship. Although some people grumbled, I never had an issue with it. If I were you, I would seriously think about forgetting the SuperSport thing and trying to get more out of it (which also isn't easy). I liked my VFR, but I got tired of being blown past down the straights by the SV's. I now have a 750. Unfortunately the 400 just isn't competative anymore. I have tons of races on that bike so if you need any info feel free to contact me.
Chuck