A scooter type vehicle such as motorcycle has a structure in which a seat member is arranged above a rear wheel so as to extend in a longitudinal direction along an advancing direction of the vehicle, the seat member includes a drive's seat section and a p...

An engine unit of a motorcycle generally comprises a cylinder head, a cylinder block formed with a cylinder bore therein, a crankcase and a rear case sequentially assembled in this order from a front side of a motorcycle body. A crankshaft is pivoted to a ...

A scooter type vehicle comprises: a unit swing type engine provided with an engine body having a cylinder assembly forward inclined in a horizontal direction and having a central axis arranged along a longitudinal direction of a vehicle body and a transmis...