A collapsible personal transportation vehicle may be compacted and stowed in a mobile home, recreational vehicle, or the like, during periods of non-use and transport. Although the vehicle may be powered with a gasoline or electric power plant, a propane fueled engine is used due to its lighter weight and lack of fumes or leakage problems during transport. The vehicle may accommodate two riders, and achieve speeds of up to 30 miles per hour, or greater. To achieve sufficient collapsibility, the vehicle includes a seat assembly constructed from various pivoting members, whereby, during use, riders are seated above the motor, but during periods of non-use, the seat assembly folds down to fit into a space in front of the engine, with a height no greater than the engine and fuel tank(s). The preferred embodiment accommodates a roof structure as part of the collapsible seat assembly, which may be provided with a canopy and/or rear-view mirror, if so desired.