Abstract: An improved pontoon system designed for supporting a motorcycle of the three-wheel off-road variety. The pontoons are connected through a pivoting frame to the main motorcycle structure. The position of the pontoons is controlled by a lever arm and handle, secured by locking pins, permitting the pontoons to be positioned in three positions. The first, a fully lowered flotation position, supports a three-wheeler motorcycle on the water to a depth sufficient that the drive wheels of the motorcycle will, through a paddle wheel effect, propel the motorcycle through water. A second, water entry and water exit position, is somewhat higher so that the pontoons will clear small obstacles as the motorcycle enters or leaves the water. A third, overhead terrain traversal position, permits the motorcycle to be driven through rough underbrush and undergrowth and the like while the pontoons are fully clear of any ground obstacles.