If you ride at various elevations and temps and are considering Dial-a-jets, don't. I use an ATTAC on my sled which compansates for elevation/temp and barametric pressure. This device requires no interaction once it is set up and will auto adjust all of the above on the fly. For us western riders, dial-a-jets were the bomb for a few years then Holtzman Engineering came out with a product called Variflow
Last fall they came out with the ATTAC. Sveral of us have a years riding using these and they are awesome. Pipes, no pipes. mods, no mods. Basically set the reference or base jetting for as low and as cold as you will ever ride based on what, if any, mods you have and you are good to go. You will never have to touch your carbs again. I talked with Barry Holtzman this morn as to whether or not they will work on the KFX and he says if it has carbs, it will work. I told him they were Keihin CVK-D32's. He will tell me where to take the vacumn source from and that is all. www.holtzmaneng.com