bought my R50 with 33K about 3 weeks now. so i have gotten pretty acquainted to how it drives and shifts.

and i noticed there s a slight hesitation at 2200rpm with a different engine/exhust note.

it would be smooth acceleration from 1500 rpm going up, and when it gets to 2200 rpm i can feel and hear the engine/exhaust note changes slightly, and when it passes that it goes back to the same smooth acceleration note like before 2200 rpm.

i would graph it it would a nice linear line, but at 2200 rpm, there would be a small small dip in the line.

this happens in every gear, (5speed manual)
any ideas?

thanks