You won't need new tires unless you plan to race your bike. I've been running on my stock tires for 4500 miles and I've definitely pushed them several times with no issues.
Training, practice and gear are all vital... be safe!
09' SE Ninja 250R
Shogun crash kit, Sato Racing bar ends, Pazzo shorty levers, Puig DB screen, Proton flushmounts, Luimoto seat covers, Fender Eliminator w/ LED signals and plate light, Progrip 725 black/green grips, Immortal Graphix Monster tank pad