I just reached the 600 mile mark so im starting to get on the throttle a little more... I noticed that when i accelerate hard, not full throttle, but not cruising up to speed either, the bike goes from smooth below 4k rpms to a kinda harsh vibration above 4k. Is this normal? Sorry for the dumb question, but i haven't noticed this in my other bikes so dunno if its a triple thing or what? My other bikes vibed all the time lol.