A system is provided for processing video images for display. The guard is mounted to the outside of the engine of a motorcycle. In a preferred embodiment of the invention, the collar is made of a plastic material selected from acrylonitrile-butadiene-styrene, high impact polystyrene or the like and has an indentation around the side so that the bag can be installed and tied. These properties are important in applications including solvent based coatings, films, powder coatings, pre-impregnated coatings, laminates, compression molding, and thermosetting resin extrusions. The machine is enabled to carry out transactions for multiple users simultaneously.