Method for adjusting the initial spring tension of a wheel suspension of a motorcycle and motorcycle with an adjustable wheel suspension device

The method involves adjusting the wheel spring load according to the filling weight of a fuel tank of a vehicle. A wheel spring unit (2) is adjustable during the driving. A front wheel of the vehicle is assigned to the wheel spring unit. A rear wheel of the vehicle is assigned to the wheel spring unit. A sensor (7) is provided with a lever switch with a float gauge element.