hrmm well i keep it mostly to speeding, though the nsx has punched out cats and belches fireballs if i get too aggressive with the throttle. hrmm speaking of which, my buddy was riding with me a few weeks ago and brought along his V1, it was night, very little traffic on the highway and i quickly discovered that the nsx will easily do 160 and keep pulling hard. i really want to know where it tops at but we ran out of space and its really not worth my life or driving priv's to find out. maybe after i do the engine re-build i want in a few years i'll take it to utah and find out the right way