If you have the 030card, then you'll need to get one of those cycle speedo, but as Fontyy suggests who cares about the speed you're doing..... Seriously I've ridden which out a speedo on an old MC28 I had. In town I drove at the same speed as everyone else, and in the countryside I just gunned it everywhere.....oh how foolish we were in our youth.

I seem to remember that the rough speed can be calculated via the rev counter. I think 8000 rev equals 80mph, 9000 equals 90mph and so on.

Hope that helps.