I believe they are not allowed in WKA sanctioned events. I could be wrong. Its good to get rid of them off the helmets. Yes the head is the best shock absorbing, vibration. But its not safe. Do you “NEED” it on A helmet for data research, nope. Front fairing with vibration is fine. On you fuel tank if you want to see your wheels pointing direction, don’t need to see straight ahead, curbs and tires is most important.