ZX-2R said:Brian, I'd look at the size again. You should have 16" on a EX250 (ninja250R) but 17" on a Ninja500R. Kenda is an inexpensive tire...less quality than your original tires. Since tires are actually the only things contacting with the road they are prpbably the most important part of the bike. Try looking at Pirelli Diablo's, Metzler, Avon, Michelin...stick with a Sticky tire, not a cruiser tire as your sport bike is completely different than a cruiser.