I don't ride motorbikes but many years ago I visited a mate who was a moto mechanic and he had just finished putting a new motor in a KAWASAKI 900 and he asked me to go for a test run with him. We got going and when the speedo got to 180 klms. an hour i wacked him on the back of his helmet and told him to slow down. Boy, can those things go the acceleration is amazing so you would want to be sober and have your wits about you when you ride those rockets.!!