Bearing selection for motorcycle wheel and crankshaft

[Dafack]

I wonder on the importance of the dynamic of two wheels vehicles on the bearing selection process. Does it have to be taken into account for the bearing life calculation ? As opposed to a car, a motorcycle is leaning when turning... Plus the load repartition varies with acceleration and braking. But how to quantify those factors? And finally I have no ideas of the temperature reigning in the near environment of the crankshaft bearings.
Thanks in adavance ;-)