[nig]

It's not generally recommended to go b*****. It slows down steering or can cause funny handling problems from the tire's profile being altered by being squeezed onto a small rim. Also your bike does not have so much power that it warrants a larger contact patch. Usually what the manufacturer sticks on there is a good size.

 

[nig]

I honestly think the best thing you could with your money is spend it on the MSF class, lots of safety gear, and then riding schools. There are lots of schools in CA. You will want to modify your suspension if you like riding out in the canyons or on the track, but if straight line speed is your thing I would just save the money to upgrade to a faster bike after a couple of years on the 500 learning how to ride. Also I would recommend buying used for your first bike, as there is a good chance you will drop it at some point.