A three-wheeled vehicle is disclosed having a vehicle frame supported by front ground engaging members and a single rear ground engaging member. The vehicle includes an engine positioned forward of an operator area and a swing arm coupled to the single rear ground engagement member. The operator area of the vehicle may include seating for a driver and a passenger.

A three-wheeled vehicle is disclosed having a vehicle frame supported by front ground engaging members and a single rear ground engaging member. The vehicle includes an engine positioned forward of an operator area and a swing arm coupled to the single rear ground engagement member. The operator area of the vehicle may include seating for a driver and a passenger.

A pedal bar system includes a frame, a motor, a pedal shaft, a pedal assembly, and a tensioner. The motor is selectively operable in a forward mode and a reverse mode and is disposed on the frame. The motor shaft is rotatably coupled to the pedal shaft via a drive belt. The pedal assembly is rotatably coupled to the pedal shaft. The tensioner, in communication with the motor shaft and the pedal shaft via the drive belt, has a disengaged position and an engaged position. When the tensioner is in the disengaged position, the drive belt has insufficient tension to rotate the pedal shaft. Conversely, when the tensioner is in the engaged position, the drive belt has sufficient tension to rotate the pedal shaft. Importantly, the pedal shaft is not rotated by the motor in the reverse mode when the tensioner is in the disengaged position.

A three-wheeled vehicle is disclosed having a vehicle frame supported by front ground engaging members and a single rear ground engaging member. The vehicle includes an engine positioned forward of an operator area and a swing arm coupled to the single rear ground engagement member. The operator area of the vehicle may include seating for a driver and a passenger.

A three-wheeled vehicle is disclosed having a vehicle frame supported by front ground engaging members and a single rear ground engaging member. The vehicle includes an engine positioned forward of an operator area and a swing arm coupled to the single rear ground engagement member. The operator area of the vehicle may include seating for a driver and a passenger.

Various embodiments of side-by-side flexible adjacent vehicles, such as twin bikes, are disclosed including includes two vehicles joined together side-by-side by means of a plurality of interconnecting pivoted link bars. One or more driver riders may simultaneously or independently operate said side-by-side flexible adjacent vehicles. The side-by-side flexible twin bicycle may be configured employing different size bicycles, in-line multi-rider tandem bicycles, recumbent bicycles, mountain bicycles, and motorcycles of various types. These embodiments provide the vertical stability of a four-wheel vehicle while retaining the ability to lean into turns and ride over irregular surfaces affording for each of the riders the handling, ride and feel similar to that of a single conventional vehicles.

A three-wheeled vehicle is disclosed having a vehicle frame supported by front ground engaging members and a single rear ground engaging member. The vehicle includes an engine positioned forward of an operator area and a swing arm coupled to the single rear ground engagement member. The operator area of the vehicle may include seating for a driver and a passenger.