Hello everyone, the bike in question is a 1973 R75/5 Primary symptoms / observations: Electric starter not working 8 out of 10 times - electric starter more likely to work if the bike is hot, after a short pause for example. - upon pushing the starter button, no under tank sound from the relay, everything is completely silent - all lights and horn working with ignition on - kick starter works and starts the bike, the bike runs well otherwise. Secondary symptoms / observations - headlight sometimes is dim - with the headlight on, on two occasions (not always), i have smelled burnt plastic/rubber coming from the engine block/under tank area. I'm not using the headlight at the moment for precaution. - a while ago, i had a major electric failure, all lights out, brought the bike to a mechanic that fixed everything. He said the issue was improper wiring in the headlight bucket. Done so far: - Checked battery: good voltage at idle and at higher rpm. - Removed tank and inspected wires: no damaged wire found, no corroded wires found, no disconnected wires found. - Cleaned all connections of the starter relay sockets. No corrosion on the wire themselves, some white dust on the bottom of the relay. - Checked inside the headlight bucket: no damaged or disconnected wires - Removed starter button cover: found a spider nest from 1979, cleaned it and put it back together, all the wires seemed fine. Research done. I have read this http://bmwmotorcycletech.info/startingprobs.htm a few times, and point number 9 describes my situation. My problem is that i have zero knowledge of electricity and i cannot really perform the test unless someone guides me step by step. Question for you guys: - If you think that there is anything else i should check other than the relay, please let me know - Could you guide me in the testing of the starter relay, and in general in the testing of other parts, like for example the starter button? I need pretty literal directions, consider that i have never used a multimeter before, so please be as specific as possible. I know how to get to the relay, i need guidance in the testing part. Today I have purchased a multimeter, I have a clymer manual with electric diagrams in color, i have time and i want to learn. Worst case scenario I want to be able to bring the bike to a mechanic and tell him what i have done and possible save some money. Sorry for the super-long post.