Why did you spray WD40 over the entire bike? Very cool video of getting the carb sorted and firing it up. Watched your other videos too and it appears to be running really well
WD-40 is designed to displace moisture, spraying WD-40 over the bike helps to prepare it for starting by lubricating moving parts, preventing rust, cleaning surfaces, loosening stuck components, and protecting electrical connections. That's must be why he did it.
By the way I don’t know if you know but if you no if you have chrome balls in your BMW motorcycle you should not use Millinneum based oil it messes up the chrome bors Michael