Akathisia, can you tell me what your 250 entry level racing diatribe would be? I'm looking for all perspectives on this!
carotte, I'm probably a little late on my response to you at this point, but my usual racing diatribe goes like this: racing motorcycles is expensive and dangerous. for someone that wants to lean how to race motorcycles, on a logical level it it just makes sense to learn on something that is lighter, accelerates slower and has a lower top speed. Presumably, when you crash (and you will at some point if you are trying to go faster) at lower speeds one is less likely to get hurt, or get hurt as bad, or hurt someone else with less destruction to motorcycle (usually).
I started racing mini motorcycles on a kart track. I made lots of mistakes learning how to pass, when and where to pass, missing brake markers, coming in too hot. etc. etc. etc. The advantage for me starting small was most times I could pick up my bike, apologize to the rider I just took out, laugh about it, and get back on and do it all again, and again, and again. Rarely did someone go to the hospital, and most times the bikes held together nicely.
Compare that to a 600 that weighs 400lbs and goes 150+ out of the box. There isn't a lot of room to make mistakes. Things happen really fast and when you do make a mistake (and it will happen), things go bad really fast too.
If I were the king of the club I would mandate everyone starts out and completes at least one year on a spec Ninja 250 or have a year of mini racing under there belt before moving up. But that's just me.
I have a 2003 R6 that scares the crap out of me on the track. I love it!!! No really... .I love it! I just don't think that strapping a brand new racer to one is the best or safest idea. If not for the safety of the rider, for the safety of the other racers on the track. Having said all this, at the last race of the season at THill I was really impressed by the smooth, clean and safe passes put on me by the top three novices in 600 prody.
However....., for TRACKDAY bike, I think it's fine and dandy to ride whatever, and bigger and faster is going to give you the best bang for the buck. And I would agree with other posters that riding a low powered bike at a track day can be boring, unsatisfying and a little scarey being strafed all the time.
So there you have it. Hope it helps. Good luck. See you on the track!
pj