yeah all things new take some time to break in and will loosen up
after the break in oil is in there I HIGHLY recommend switching to a GOOD synthetic oil,
I personally like Amsoil 0-40 4 Stroke, been suing it b=problem free in my foreman for 20 yrs now and motor sounds like tit did day one and I AIN"T been nice to it!
motor gets used in temps from 100+ to minus 30, parked out side for weeks in winter time and been plowing snow for 20 yrs with it and I mean LOT of snow, one drive way over a 1/2 mile long and several trails behind place over 10 mile loops, so, its seen MILES of plowing every yr!

I do change oil more often than most ,m which I do think helps there
also stay on top of air filter always being clean, I have two washable one's, always have one clean and ready to go, pull dirty wash and dry're oil and have waiting for next time!
take care of it, I suggest BUYING a service manual, hard copy, and use it for tracking records on PM's you do and or any repairs, they are worth Buying IMO, if you plan to keep it a while!
many like the digital one's that are free many times, but I still prefer a hard copy I can hold and again use as a log book for repairs and PM's, cannot rely on my memory anymore, its NOT that good as it used to be LOL