GrillGrate Panels for Yoder Smokers YS480 or YS640 Pellet Grill Anodized aluminum grill grate package for Yoder Smokers Pellet Grills. When fit with this package, the grate temperature on the left side soars past the 650-degree mark and produces those coveted steakhouse quality grill marks, fast cooking times, intense caramelization, colour and texture common to cooking over an open fire or gas fired grill. For a YS640, one set of grates (3 interlocking grates) fills out half of the cooking chamber. An extra 3 will finish the set and cover the entire cooking surface. The YS480 pellet grill now comes standard with 3 chrome cooking grates. A set of direct GrillGrates will take the place of TWO of these chrome cooking grates and the 3rd chrome grate will finish out the cooking area.