Ok.. folks seem to want to know what is different between the 13 and other model spyders.... Previous models had an open area between the top cover and the side covers. these are enclosed on the 13's... I'm sure it was to reduce heat to the rider, but it is cooking everything under the Tupperware. On previous models you could see the exhaust pipe on the left side... now it is covered .. holding in more heat.... the right side is equally blocked. Keeping the rider cool at the expense of the bike is not a good deal... HEY... it's a motorcycle.... it gets hot.... the heat needs to get OUT!!!!! you are not supposed to ride in shorts and flip flops.... We want a bike that vents and cools itself ...