Speedo Error

I recently calibrated my motorbike against GPS because my speedometer had stopped functioning on a 1200km ride, so I needed to have an idea of the speed from the tachometer. After 12 years and 150000+km of believing 5000 rpm in 5th gear was 80 km/h (the indicated speed on the speedo, when it was functioning), I was confronted by the fact that it was actually only 71 km/h! My first reaction was "it feels like my entire life has been a lie" 😂

ps: this was another forgotten draft... from March 2024! Strangely enough, Carly's tachometer (in fact, the entire meter console) failed a few months later. as of now it has a working backlight but only indicates high-beam, neutral and turn signals. I now adjust my speed based on the sound of the engine, and my biggest surprise was looking at my GPS speed and realizing I ride faster by sound... about 10 km/h faster than I think I am!