A few 40+mph runs down the road during cooler days told me I need a windshield. Did some research and decided on a SuperATV full flip version. The top can be run full closed, cracked open a few inches, or flips all the way open. I can remove the top portion in a couple minutes also for tight trails. So far I have been pleased with this setup and the gas struts hold it open with no flopping. You can open and close it from the drivers seat without stopping.
*picture from the website as I can't recover this one from photobucket*