Windscreen extension spoiler mounts to the top of the stock R1150GS windscreen resulting in a higher profile in front of the rider and an air channel between the screen and spoiler. This allows for better laminar airflow behind the screen and greater wind deflection around the rider without excessive buffeting. Simple-to-use design clips to the top of the windscreen with a CNC machined metal clip assembly resulting in no modifications to the windscreen and a part that can be taken on and off quickly if needed. Spoiler is made out of clear Macrolon and includes a strap and hook for securement to the bottom of the windshield to keep it firmly in place. Spoiler can be mounted at different angles to precisely fit rider's height and comfort preferences.