What Doug said about the R pipe.I have just the can on mine.I have had 3 people buy them after riding mine.You can find them on Ebay for $30-$80.With the pipe and all the mods I walked away from R's.When I needed valve work(after 3 years of racing)I installed stainless R valves and a stage 2 cam. My X now runs away from the R's.Now if I was just a little more uninhibited to use all that power.
Dale