I don't recall 'many problems'? The only significant thing I can remember is a brake locking up.
A bigger issue for me was the fact that the trucks completely disappeared when they hit (IIRC) Central America. They loaded the bikes into a bus and drove them across Mexico (which didn't speak well of the Harleys either).
All that said I still reserved one.
Did we watch the same show?
They thoroughly explained how this was 100% about safety and the real risk of getting kidnapped in Mexico, even adviced by locals, when Ewan wanted to do the drive by himself.
Mexico isn’t exactly known to be a overly lawful society.