I don't know, those bars just seem to be another expensive bling gimmick that folks think they need. My 5 seems to have no more or less vibration than my '97 KX250. I only moto, and play ride, so I really only ride flat out for about 20 min max. Maybe an all day hard ride the vibration is more noticable, and then a person can warrant spending $400 clams on bars. All's I need are a good set of Renthals, and I am content. I'll pass on the bars, my priority for spending $400 is a STEERING DAMPER.