This International Standard specifies a measuring method for determining the location of the centre of gravity of the moped and of the moped/rider combination. It applies to two-wheeled mopeds. Other measuring methods can be used if it is demonstrated that the results are equivalent. The measuring results obtained by the method given in this International Standard alone (see Annex A) cannot be used for an evaluation of the vehicle stability because they deal with only one aspect of this very complex phenomenon.