Greetings. New member and first post here. I have a 2013 FJR with a Givi V47 tech top case and I do receive significant buffeting at highway speeds when using the case. All is perfect when not using it. It is possible that my particular accessory choices contribute to this situation. Those are, a Puig touring windshield and extension, the heavy duty yamaha aluminum rack, and the FJR specific Givi monokey bracket. I have not yet experimented with filling the passenger seat void with a bag or a person which may alleviate the buffeting. I hope this post can contribute something meaningful. Cheers