I have an '04 450 exc bone stock with very few hours on it. I want to clean up the jetting as it is pretty lean. I am very mechanically inclined but I have very little experiencing with messing with a four stroke carb. I was curious to understand two things. First how difficult is a JD jet kit to install and does it require much fiddling (I literally get to ride 3-4 times a year and I don't want to be in the middle of nowhere messing with my carb). Second, is there anything else that should be done to the carb to get good results. Again, simplicity is key. I have hear things about squirt timing, power now and something from Boysen that is supposed to help. Thanks for any advice!!!!!!!!