I had my speedo in Kph (it's switchable) when I went over the other week, approaching 200 and it got a bit wafty, toward 220 and it was pretty horrific, so I stuck to cruising at around 180-200. That was with the roof down. I didn't try that fast with the roof up because over 170 the wind noise was terrible. :lol: I need to regrease the seals where it meets at the top.
My old and worn front RE050's may have had an impact, I really don't like them. But the S2000 is known for having poor aero so I think I need to look at a front splitter or something like that. Maybe adding the little spoiler on the back without doing anything to the front has upset the balance, Honda only sell them as a pair.