Urgently Wanted Help

Hello all, I have bought another scooter (Piaggio x9 500 i.e. Evolution). I have the following problem: With high load (uphill, high speed) I notice ignition dropouts. I also have start problems with warm engine. Starter does not start, however, as drunk or so… Cold starts immediately! I have replaced spark plugs and plugs, air filter is new and a new ignition coil is ordered. Comes these days. From the friendly dealer ic h get the tip, it could probably be the “pickup sensor”. I can’t find it in the WHB, at least not with this name… Which sensor did he mean with it and where can I find it? Can someone please help me? I would also be grateful for other tips for finding faults 🙂