:iagree: I agree with all the guys above, about the 500's. If you're keen to get into racing DO IT!! :dthumb: It's the most fun you can have with your clothes on! (and the second most fun in leather..........or so my girlfriend tells me!!!)
I've got a lot of mates who say they would prefer to race in a larger class (600's or above), but I'm racing smaller 2-stroke bikes (Moriwaki 80, Cagiva Mito, and building a YZ100 in a TZR250 frame). It's way cheaper, and heaps fun. I also steered away from 250 production classes, as these are full of 16YO's determined to be the next Valentino, who will run you off the road for 21st place. (of course, if that sounds like your kind of racing, go for it!)
Get into something cheap first, until you find out about the "hidden" costs. You can always change up later!
:welcome: and :luck: