You might want to either talk to your dealer or check closely in your owner's manual. My Kubota B2710 idled that fast, or maybe a little faster. That just did not seem right to me, but I read in one of the manuals that it had to do with emissions; supposedly cleaner exhaust with the fast idle. Anyway, it was a simple matter for me to adjust it down around 750-800 or so. I didn't leave it idling that much, so I don't think I hurt anything.
I thought about turning it down but I'm Leary of doing things I'm not sure of with the more modern motors there may be a reason for it, were no longer dealing with a holly 750, just wanted to make sure. Thanks for the input .
My DK45S idles between 800 and 900 as I recall. The spring that controls idle rpm is one of the things they say to leave undisturbed if you replace the IP. I suspect it's an emission thing. But I don't see any real problem with fast idle.