OK guys, need some help. Have a friend with a 1996 XR650L and we need mods for the muffler, air box, and jetting. Can't find the info on search so what can you do to help us out? Also, this particualr bike has a rather large pump of some sort on the left side of the motor and a canister hanging next to the carb. Is this a California model? What is this thing and can it me removed? Appreciate the help.