They say 137 for top end? I´ve had mine to 135 in 5th (forgot to shift to 6th!) and the previous owner hit 149. I now have Z-rated Michelin Macadam 100s (150/70 rear) in case I try to break 150. It´s a fun first bike - not super sexy, but check out airtech for a solo seat cowl, and Vance and Hines for a new canister.