I have what may be a similar noise that's driving me nuts. Seems to be most noiceable at 2200 to 2800 RPM range, but is actually present at most RPM, hot or cold engine. Strange thing is that at idle it become louder at time, but not in time with motor, seeming to be more intermittant, even has almost a scraping soundas if something needs more lube??. Scary driving this thing, never knowing if your getting home or if the sucker is going to seize. My dealer, having no experience with the 110,s prefers to wait until the 1st warranty service to see if it goes away. Not sure if that means wears-in, breaks or blows up, so any fault finding will be a little easier.