Moin moin an alle, am a year proud owner of a US import from the north of California (Am große Bären-See 😉 ). I got the good piece as a kit bike and installed it myself as a reputable garage customiser. I had paint and coating done by friends. After 4000km of total fun I think again about a gear oil change. All other inspection work I did according to dealer specifications and mileage data. finite question: Can one recognize by the transmission oil when it is due? Color is like the 1st day. How do I recognize old or worn transmission oil? Thanks in advance for your answers. Greetings, Gunna