Aus dem nachfolgenden Link:
"... There had been, the riders alleged, “strange noises” coming from the bikes of four teams – Team UAE-Emirates, Deceuninck-QuickStep, Jumbo-Visma and Bahrain Victorious. ..."
https://cyclingtips.com/2021/07/tadej-pogacar-responds-to-motor-doping-insinuations/