I was on my way home yesterday and riding in the HOV lane here in Houston and got frustrated being behind someone that was going 60 and passed them at a certain point that was safe to do so. As I was passing them I looked down and noticed I was already up to 90 after kicking it down into 3rd and traveling back up into 5th so I figured what the Hell let's keep going since I had plenty of room and at about 115 or so I felt the whole bike start kinda wobble or wallow down the road so I almost hit the shutoff point and decided to back out of it. Has anyone else noticed this at this speed and what is the cause? Will a Super Brace fix it or is maybe the tire slightly out of balance?

Thanks,
Wylbur