I have a bmax 125 and the tacho reads just under 3000 rpm at 70 mph and just iver 3000 rpm at 80. Cant be more precise as tacho is not digital.
What i can say is that the engine is very quiet at these speeds, so much so that ive found myself at 70 forgetting th change up to 4th a few times. and also in common with most cars, the speedo over reads by circa 10%.
Hope this is of help.Edited by: cianpars