I was riding around today and got on it from a light. Everything was smooth until about 80-110mph it felt as though the bike was chugging along so I immediately let off the throttle. It feels like I'm going over some rough road on the backside of the bike is the only way I can describe it. When I was in 5th gear and took it up to 115mph it felt smooth all the way through. Any ideas on what it may be? Bike is an 07' cbr600rr with 30k miles. Had the 16k mile service done and oil changes every 4k miles since I owned the bike (around 25k miles is when I bought it.) Any ideas on what it may be? I lubed the chain last week and the sprockets and chain looked good. I'm definitely no expert though lol.