When Garabaldi first approaches Ivanova in the Casino after her fight, her hair is loose, but in the next shot her headband is back on.
Lennier says "Ah Mr. Garibaldi, I was just about to embark on the mysteries of the fuel injection system. Would you care to join me?" That year ninja motorcycle did not have fuel injection, it had carburetors.
Mr. Garibaldi seems to make a contradictory statement about the motorcycle, claiming it is in pristine condition, yet he says he has been scrounging parts for several years. It seems unlikely that a 200+ year old motorcycle of scrounged parts would be pristine.