Looking for a cart built for all seasons? The Yamaha UMAX features a durable chassis and often includes heavy-duty batteries, making it an excellent choice for cold-weather utility and year-round use—no deep winter hibernation needed! Food and Merchandise Service Vehicle Servicing your customers has never been easier. The UMAX Bistro features a four-lid ice chest, sliding snack tray, a vertical display case with slanted shelves for displaying all of your merchandise with easy access.