Ok think i'm going through my mid life crisis lol. I want another dirtbike. Have a YZ250 now. I was wondering what you would recommend as far as years the ones i'm tossed up against is i've found a couple 2006 and 2007 YZ450f with some extras like exhaust for about $3000 and I found a couple stock, low hours 2009 YZ450f for $3000-3200. Is the 2009 that much better to forgoe the extras on the earlier models? I know the 2006-2007 made more power because of the exhaust but thats the extend of my knowledge of the differences.