My recommendations
1. Turn off the motion sensor
2. Format the microSD card directly in K1 every month
3. Use only the original power supply (5V, 2A).
4. Firmware: k1s-r180_en_KPH
5. Use good microSD cards, for example WD Purple:
https://www.wd.com/products/surveillance-solutions/wd-purple-microsd.html
Installation (Toyota Auris 2015):
Best regards.
Better late reply than never... Think about this.... When your turn on power to the system (bike) the K1 DVR boots properly, but when you crank your bike (start the engine) your starter pulls a large enough amp/current draw which reduces power to the accessory devices including the K1 DVR , not enough to completely reset the DVR (sometimes does, sometimes does not) but enough to corrupt the DVR operating system and preventing it from operating correctly till the K1 DVR is reset...Wouldn't happen every time. just depending on the power draw..(cause by conditions like low battery charge, temperature, rain, snow, thick oil, high compression ect..).... Might explain some startup problems on the other systems (C5,K2) ...
Wallace from Super Mario Bros 3D