What is "motoboard"

MotoBoard was the first mass-produced motorized skateboard, made possible by the advent in the mid-1970s of polyurethane skate wheels, as well as the production of lightweight small industrial two-stroke engines (typical of today's string trimmers). Skateboarding and outdoor skating experienced explosive growth and popularity primarily due to "Stoker" wheels, the first widely marketed urethane outdoor wheel. The urethane wheel forever changed the industry standard, as up to that point, steel wheels and composite indoor skate wheels were the only option for the sidewalk surfer and outdoor skater.