I am wanting to know from some who have owned the older Tri-Glides and now the 14 or 15 Tri-Glides. I am wanting to get a new one mainly for the cooling system on the 14's and 15's but do you really notice much of a difference on heat generated while riding from the older ones to the new ones? Also do the older ones overheat and cause you to have to shut down? I am wanting to make the best decision I can but money does not grow on trees or I would get a 15 today. Thanks for your input.