New RZR ????’s

After putting over 500 miles on the new RZR in the Saguache Park area of CO I have some questions. How do I quiet down the annoying exhaust? Trail riding between 10 and 15 MPH it is terrible, Reminds me of a 6v92 Detroit diesel. Going down the roads at higher speeds it mellows out quite a bit and becomes way more tolerable.
Another issue is the clutch. Does it get better the more the belt and clutch gets broke in? Jerky is not a good description. My previous ATV is a CAN AM 500 Outlander Max and the clutch on that machine is as smooth as glass. So its a big adjustment going to the RZR clunking and jerking. Makes loading it in my Fuzion Toyhauler very interesting.
Thanks