shown escorting the GM sunracer Pour moi, BMW. K 100, vraisemblablement... I agree. May be Australian police by color. They used K100 with small shield like this.
shown in this GMC promo video:- /vehicle_83703-GMC-unknown.html Suzuki RM?
Sure, RM125 of '86-88 (It looks brandnew for promotion movie. '88 is most likely )
also shown is a concept bicycle This bike is here http://www.burningart.com/meico/moto/sbarro/ , but nothing about the model name.
It´s a Yamaha Skorpion concept , after Yamaha GTS model