Question about idle 2004 sportsman 700 efi

Ok I bought it last week it has 1,736 miles 358 hours. I replaced the throttle body boot because it was dry rotted. When I first crank it cold start it it idles at 600 rpms and quickly goes up and fluctuates between 1000 -1050 rpms. Doesn’t seem right. What should it be idling at? Is there a way to adjust the idle on efi?