Nothing helps.. I'm really disappointed in this machine in this regard. My RzR while dusty much was reduced by having a Ryfab windiow with a vent. I currently have EMP window that has vents that are so small they are useless. Back window does not cut down any dust in my experience. I have plugged like virtually every hole which can actually make it worse by creating negative cabin pressure. I just took off full windshield and left rear window and after a mid to high speed 86 mile trail ride, there was virtually no dust. I am hoping that RyFab will build a front window with LARGE vents and fold down.
You don't need to wait for Ryfab. Go to Deranged Off-Road. They already have what you are wanting Ryfab to build. I had a Ryfab on my General, with the large vent across the bottom. It was great, so I knew that was what I wanted for the KRX. Deranged has it. Glass windshield. I think the vent is even larger, so much so that you can actually feel the wind in your face when it's open. Also, when open, you can see right through the opening, so you don't have a big blind spot where you can't see directly in front of the machine.
It's a two piece design, so the passenger can adjust their own. When open, there is virtually no dust being sucked into the cab because of the windshield. I have never run a rear window.
Deranged Off-Road