By through the years I mean the 07, 08, 09, etc. models.
I realize they will be small differences, but I'm just strongly curious about the subject because of my new Fly 150. And I've spent quite a while googling around looking for info about it.
The only difference I know of between the 08 and 09 is the clear (white) tail lights, which looks very nice because I got a white scooter, and the only reason I noticed it is because the dealer who sold it to me pointed it out.