When my 4/4 Sport was delivered in 2009, my speedo was quite optimistic ( 15-20% too high); the calibration was set at 21000 p/min. A friend of mine who also owned a 4/4 Sport had sorted out the right set up for the calibration at 22760 p/min. I chequed it out at the highway ( in Belgium a sign post every 100 meter) and that set-up was correct for a distance of 30 kms!
To calibrate you have to press the button beneath the dashboard, then put on the contact and the calibration figures begin to flash one by one; you set them at 22760.
D'herde Bart
