I just changed sprockets and chain today. The bike has some vibrations in low speed 5-10 MPH that I don't remember before. The vibrations are only on low speed when I slow down before stopping. I went back to the dealer to check whether the chain tension was adjusted properly. The mechanic check the chain tension & and the alignment. He used the laser tool to measure if the rear sprocket is in line with the front sprocket and went for test ride. Of course he didn't feel the vibes. I wonder whether the vibes are related to the new sprockets & chain or whether the last wheelie that I did on the bike might damaged the wheel front bearing. The vibes feels like my front rotors are dent or something although they are in perfect condition.