OK so here it goes I havent been ridding lately but let my friend run my bike(05) every week since feb. well its time for a new cam chain I did the valves and rest of top end 48 hours ago.when the cam chain got put in I had a wiseco cam chain put in and it has stretched to point where the its at the end of its adjustment. I have had the head of and checked the valves bore cylinder for flaking and the checked the bottom end replaced bearing seals and gaskets while I was at it.I put everything back together besides the cam chain. Im wanting to know now is the difference between the 07-08 model and the 05-06 model cam chain? I see cam chains that say there for 05-09 others that are just 05-06 then the 07-08 ones. Is the 07-08 cam chain the same as the 05. ybn has them different. wiseco has them the same for 05-09 and then again they have them just as 05-06 and 07-08. sgp or oem has them the same for 05-09 aslo.The big difference is price oem being 85 wiseco 60 ybn 30. I have heard go things about ybn but if is just 07-08 models then looks like Im getting different brand.