Motorcycle with an elbow tube to the filter connecting a rear air has a throttle device

The invention relates to a motorcycle in which an air filter (44) over a cylinder head is connected to an intake port (41) of the cylinder head by a connecting tube (47), a throttling device (45), and an insulator (48). According to the invention, the connecting tube (47) is formed to curve in a shape such that the connecting tube (47) has its upstream end open towards the front and is curved outwardly in a direction obliquely rearwardly.