Jetting the bike is much easier than you think,it only requires a few basis tools,studying what you do the first time,and after the first time you will be a wondering what you were so apprehensive about.I would not make half of my desision to buy or not to buy a certain pipe, based on wether you need to rejet or not.Sooner or later you are probably going to make some type of mod that will require a jetting change.Might as well get this jetting part of the bike behind you,cause next up for us folks that have never done it is valve shimming. Al