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Sincerely Your, SURF3DMORE INFORMATION ABOUT 3D MODELS :A MOTORIZED BICYCLE IS A BICYCLE WITH AN ATTACHED MOTOR OR ENGINE AND TRANSMISSION USED EITHER TO POWER THE VEHICLE UNASSISTED, OR TO ASSIST WITH PEDALLING. SINCE IT SOMETIMES RETAINS BOTH PEDALS AND A DISCRETE CONNECTED DRIVE FOR RIDER-POWERED PROPULSION, THE MOTORIZED BICYCLE IS IN TECHNICAL TERMS A TRUE BICYCLE, ALBEIT A POWER-ASSISTED ONE. TYPICALLY THEY ARE INCAPABLE OF SPEEDS ABOVE 52 KM/H (32 MPH), HOWEVER IN RECENT YEARS LARGER MOTORS HAVE BEEN BUILT, ALLOWING BIKES TO REACH SPEEDS OF UPWARDS OF 72 KM/H (45 MPH).
POWERED BY A VARIETY OF ENGINE TYPES AND DESIGNS, THE MOTORIZED BICYCLE FORMED THE PROTOTYPE FOR WHAT WOULD LATER BECOME THE MOTOR DRIVEN CYCLE.