I have a 2021 street glide that shakes at 100mph. Im a bigger guy at 6'5 280 lbs and I've always been on cvo road glides and this is my first street glide. the shake is in the handle bars and only at higher speeds. I have 12 inch handle bars and stock seat. anyone have any suggestions on what I could do different? taller bars or tall boy seat? I've had the dealer check the front end and weights on the tires.