Yoshimura is a big supplier of aftermarket cams. But you may be putting the cart before the horse - what are you looking to accomplish? More top end hp? More low or midrange torque? can't have it both ways, and an aftermarket cam may or may not be the best way to achieve what you want to do. Also, understand that you will need a ECU reflash or tuning module like a Power Commander or Bazzaz or the like as well. Typically, re-camming is done in combination with several other modifications so that the bike only needs to be re-tuned one time. It isn't a good choice for a standalone first mod to the bike.