Hello all! I have a 2015 Grom with about 1800 miles. For the past 200 miles or so, when I am in 4th gear at around 55 mph (typically WOT), I hear a high pitched "screeching" noise. It almost sounds like wind through my helmet but it is coming from the bike. If I loosen up on the throttle, it changes pitch and comes to a stop. I recently adjusted the chain thinking it might be too loose but the sound hasn't stopped. Any thoughts?