So I have had an 899 for about 1000kms now (rode it for about 500-700kms with no niggles after service)...got all fluids changed after getting the bike. The last time I took the bike out she started popping when downshifts and rolling off the throttle and a few minutes after the throttle response in 1st gear and low rpms started lagging. As in I had to twist the throttle a bit more than usual to get the same response I used to previous get. Bike seems to run fine in higher gears and rpms. Any possible leads on this?