I experienced some overheating on my WR250R this past summer right after I installed the Flatlands plate. Granted I was loaded for touring, it was hot and I was in Utah. The overheating light would come on while at speed, but slowing down it would go off. I suspected that it was restricting the airflow a bit too much in those conditions. I replaced the coolant with Engine Ice, and have not gotten the light to come on again (5 or 6 rides since then). If it does, next step is to remove some more material from the guard to allow some more air movement. The light never came on for me when I was moving slow, even with high RPM's on more technical stuff.