Harlrey-Dsvidson Looks like a retired USA cop bike? Maybe a much earlier model from the 1960s? Not a retired one I think, the Brussels police used Harley Davidsons at that time. The Brussels police bought new Electra Glides in 1981, so this could be a 1981 Harley Davidson FLHP Electra Glide Police. Of course I cannot be sure if they used genuine police bikes in this movie.
That bike is only briefly visible, I don't think it was deliberately placed there. Must be genuine.