Now I ask myself, “If I were designing something wouldn’t I want to make it easier on myself if I have to use it?”  The answer is yes.  Now look at this picture.  Note where the exhaust pipe ends and where this lines up with the bolt at the end of the axle holding the rear tire on.  See anything wrong?  Yep.  Can’t take the tire off without taking off the exhaust system.  Now think about this.  This is a bike with an exhaust pipe on each side of the tire.  Even if you could take the castle nut in the picture off (you can’t) you still couldn’t pull the axle out.  How hard does this make it to change a tire?  Well first you have to take off both exhaust systems – all the way up to where they connect to the engine block.  Yeah, dirty job that adds time … then you can take the back tire off – provided you have a center stand in the first place …