If its a technical track, then you'd probably want to stick with a lighter bike.
Of course, the best option is to have both a small HP bike and a big HP bike.. like Niner does (lucky bastard lol).
I slightly fixed that for you, but I agree with the general concept.
Also, Niner is not lucky because he has multiple bikes. Anyone can do that. What he does get to do on regular basis, is lucky and I'm very jealous.
How do people logically progress? Start small, work your way up. If you are just having fun, do what you want. If you want to be as fast as possible as quick as possible, start smaller. Learn how to maintain extreme corner speed, then if you want to graduate later you'll be fast everywhere and not just the straights. It's a racetrack for christ sakes, where's the fun in only being fast in a straight line?
If you graduate to racing, you will race only liter bikes and I can assure you they'll be fast in the turns.
1st paragraph, I agree.
Last sentence can be taken out of context and cause confusion, as you did not specify which bike you were referring to racing against the liter bikes.
You can race other classes...
600s can class up, 1000s can't class down. I'm not following you.
In each class there is usually a sub division to split up and make things a little more competitive. This is a brief overview, it may be different from one race org to another but generally I've seen three sub-divisions in every class.
= Less modifications, closer competition because as it relies more on rider skill than the bike/power/$$.
= More modifications, bike/power play a bigger role in your ability to be competitive.
= Money is no object, lots of 'custom' parts/modifications, and usually it's the fastest/most sponsored guys on track.
As for race classes:
Ultralight: Hawk GT650, EX250/500, CBR250/500, etc.
Lightweight: SV650, EX650, Monster 696, etc.
Heavyweight: 750 - 1000's
Grand Prix: any two smoker that wakes you up promptly at 6AM trying to warm up their engines.
Motards: any wannabe dirt bike that can whoolie.
Side cars: anything that leaks oil all over the track so we can sit on hot pit for hours in the sun while they clean it up.
Hope that makes sense.