I have heard three different years of this bike so far 06-08 and i wonder if anyone would like to help document the differences between them. I own the 06 version, and when i was trying to help leemoore with his problems on his 07, we found out that both the Emissions system and CDI were quite different. Also, there seems to be an o2 sensor on the 07's and none on the 06. if anyone else has any helpful info please contribute.