First Polaris, just Bought. Questions

Hi- I just purchased a used 2013 Polaris sportsman 500 HO. Would anyone know what the warranty is? It only has 90 hours and 247 miles on it and i was not sure if it would still be in warranty .

Also- what should it idle at? it sounds like its to low of an idle , around 930RPM. And when I hit the throttle up a bit while parked and let off once the idle goes down it makes a clicking noise somewhere toward the top of engine area under seat, not sure what it is. But is seems to run great.

I am going to serivce it, any suggestions besides the recommended services?

Thank you for the help, I really appreciate it!

Jim