w/o checking for sure, I'll go out on a limb here and say that your bike did not come stock with 606's. You may get a different header, but you get the same tires. It had 603's on it I'm betting from the factory. I can say this for sure on the '09 model.

WESTOZ- you got an '07, what tires were on it when new?

 

I got 603's. I'm trying to trash them but they're tuff little buggers.

 

that's what I thought. the' 09 got new tires just fyi.