Hi! Bike has just passed 2200 km and I enjoy riding it but still learn things. What I notice from day one was that engine produces detonation like sound when accelerated from low revs (2000-3000). Regardless what gear it is in - when open a throttle wide I hear a very high pitch noise coming from each cylinder. It may be something else and (I hope) is normal as it is not too loud... Always fuel it with 98 octane petrol from BP. Will try a different fuel supplier next time, but I doubt it will resolve the noise as BP are quite good. Another way to avoid it is to keep revs above 3000rpm at all times. Any insight on this will be appreciated.