Moin and friendly greetings, the following problem: the motorcycle doesn’t want to start any more. Battery is replaced, spark plugs are replaced, fuel is about 3 weeks old, starter turns. I may have been able to narrow down the problem a little bit. When I turn on the ignition, I have a fast cracking noise under the tank (as far as I can hear it right ), as if a relay was not working properly or defective. As far as I have seen it correctly, there are under the tank the Ignition coils and a sensor unit. My question is under the tank relay ( Have made me a rough overview of the electrics by the hand of a spare parts catalog for the wire harness ) What is the purpose of this sensor unit? Do defective ignition coils make such a noise? Do not know me with the things ( truck – locker ). Small update to the wash. Right side height air filter, if I reach behind the air filter and the ignition switch on are easy vibrations to feel, however it can be There is probably an air injection control valve. And last but not least: I miss a sound. I don’t hear the fuel pump when the ignition is switched on. Does the fuel pump start for a few seconds (for the purpose of the pressure setup) or does it start at the start of the starter? Here, however, I have to pay more attention to it. Thank you in advance.