OK, so these are the speed and RPM numbers I see in that log, do they look about right?
IBUS: 00:03:20.13 80 05 BF 18 00 09 2B [2B] -> 0 kph, 900 rpm
IBUS: 00:03:22.13 80 05 BF 18 00 0A 28 [28] -> 0 kph, 1000 rpm
IBUS: 00:03:23.45 80 05 BF 18 02 0C 2C [2C] -> 4 kph, 1200 rpm
IBUS: 00:03:25.44 80 05 ...