the newer bikes run different ratios to the older steel frame models. Im pretty sure they are geared longer.
where the 06 came out stock 14/50 the 08 came with 13/50
stock 06 14/50 tops out a little under 80. 15/50 takes you to 90 on the gps.
KTM Super Moto 950, KTM Adventure 950S, Honda XR650R, Honda XR125L, Husqvarna SM610, HusaBerg FS570, Yamaha YZ250WR with rekluse