Do learned scholars agree that it was the Evolution V-2 engine and the ribbed drive belt that was largely helped to turn around the HD Co. In the sense that the company made such a strong comeback in the 1990's? Or was it just simply a "cultural fad" that weighed in on the history of all of this? Also, the Evolution Engine on the Sporters is smaller than the Evolution that is on the Softail, Dynas, and Touring lines. Is it basically the same engine design wise? Is it just a matter of the displacement size? I ask because engines seem to look distinctly different to me. Hope to hear some comentary on my post.