I don't know but they'll get you for at least one hour of shop time, and maybe a jet kit + filters and probably a day or two to get your bike back. If you opt to try/do it yourself, the guys around here are more than willing/bored enough to try and help you through it. Once you get a little gas on your fingers the rest is easy, and a can of carb cleaner is only three bucks.
Thanks for the help, but i gots to take it in anyway to have the tires mounted and balanced. All together its going to cost about 450 bucks at a shop. I got the bike about a year ago, and before that, it had been sitting in someones garage for 4 years. I just got my licence, so I need to practice a lot. I think i need to take it in anyway to have a professional look at it. I'm just a squid.
Even though its a 600, its goddam fast. I better take it easy for a while.
A good tip to get you started would be to by a manual like a Hanes or Clymer. Then get a Craftsman or Husky or some other good quality basic hand tool set (sockets, ratchets, wrenches, etc.) and some good screwdrivers and a set of good allen/hex wrenches. If you put out some dough for these tools , you can have them for the rest of your life.
Then when you decide to make that Katana 600 a little quicker, it'll be a breeze.