Your Bonneville will, obviously, feel more upright than the BMW RR but in your first session (assuming this is your first time at the school) the first couple of laps are slow-speed, follow-the-leader 'sighting laps' which allow one time to adjust to riding position anyway. The first session is usually spent getting used to the track and lines, getting used to the bike, and still early in the day so tyre and track temperatures can still be cool - point being it's not worth going flat out immediately. The coaches really know their stuff and are fantastic at looking after you so you will get a