There've been so many comments lately by those that plug in some sort of music and ignore the 'sounds' .... well I'm surprised some have not weighed in.
Mine doesn't seem noisy to me, just a nice sewing machine sound. 'Course I can hear if I've mis-adjusted the right exhaust tappet too loosely. I'll bet you though that every one of them is different. Mine doesn't seem as noisy when warmed up, but if I move my head or adjust my helmet in a certain way the leg jug gets loud.
I'll wager ever damned one of them sounds different. Make sure the valve lash is correct and synch the damned carbs, and ride the thing. You will get better at both of those adjustments. Get to work on the single saddle, I had a ball last winter making mine