Purchase a kit, should include everything you need. cNw or MAP have the best out of the box jetting, IMO. I would call or e-mail to let them know the specifics: Engine mods, straight through or baffled exhaust, altitude and handlebar type (rise/width) or simply Euro or Western style.
You may still have to change the needle clip position and/or change the main jet. Always read the instructions as many times as it takes you to visualize what you are going to do before picking up any tools.
Best.