J C Stokes wrote on 12/08/12 at 15:47:53:A woman I met once claimed she had seen 150 kmph or 93.2 mph on a stock S40, but it was running a stock rear tyre. When the tyre was changed to a 140/90 she saw 140kmph or 87 mph indicated. The owners handbook claims 100 mph at 6500 rpm. I don't know if there is any truth to that.
The 140/90 is a bigger tire and makes the rear wheel spin slower which in return makes the tranny go slower and so does the speedo.
That means in both cases the bike did all it could do.