Got the liquids capacity sorted out, thank you PSCHRAUBER.
Quick test ride before disassembly (no brakes fitted, no killswitch):
https://youtu.be/FjCgw3_DbKo
Engine is out, I need to weld up the crack in the frame:
Forks disassembled, new seals on their way. Springs are quite beat up, there as additional woodden spacer for preload adjustment.
Headset bearings need cleaning and greasing.