Patent ID: 8028669
Filing Date: 2011-10-04
Classification: B62M,F02B

Abstract:
1. A power unit for a motorcycle, comprising: an internal combustion engine provided with a crankcase rotatably supporting a crankshaft with an axial line extending in a vehicle-width direction; and a power transmission device for changing and reducing the speed of rotational power from the crankshaft and transmitting the resulting rotational power to a rear wheel; wherein an oil pump for supplying oil to lubricating portions of the internal combustion engine is mounted on the crankcase and a balancer is rotatably supported by the crankcase; wherein rotational power from the crankshaft is transmitted to a pump driven member provided on a pump shaft of the oil pump and to a balancer driven member coaxially interlinked with and connected to the balancer so as to transmit power to the balancer; and wherein the pump driven member and the balancer driven member are offset from each other in a vehicle-width direction and are located at such a position so as to at least partially overlap each other as viewed from the side of the vehicle-width direction.