Abstract: An air intake system is combined with a power unit cooling system in a motor scooter. An air cleaner is disposed within the power unit casing and an outlet from the power unit is connected directly to the engine.

Abstract: A scooter having a low bed footboard, a rear cover rearwardly of said footboard and a front cover forwardly of said footboard. An engine is located beneath the forward portion of the footboard. A variable diameter pulley V-belt transmission is located beneath the rear cover and is pivotally mounted to provide a swing arm rear suspension. A drive shaft extends between the engine and the transmission beneath the footboard. A storage compartment is positioned within the rear cover beneath a seat. A fuel tank is located within the front cover generally above the engine.

Abstract: A frame structure for a low-floor type, small-sized vehicle. The frame structure comprises a pair of right and left plate members extending substantially fore to aft of the vehicle and having the thickness dimension thereof extending in a substantially transverse direction and the width dimension thereof extending in a substantially vertical direction and each being provided along at least one of the upper and lower edges thereof with an outwardly bent flange portion. The structure further includes a plurality of cross members which rigidly connect the plate members with each other.The frame members of the structure are easy to manufacture and at the same time are reduced in the wall thickness thereof, and consequently are reduced in weight, without impairing the strength and rigidity thereof.

Abstract: A rear cover device in a motorcycle having an engine disposed substantially in front of a rear wheel, a muffler at one side of the rear wheel, and a rear wheel support member and a shock absorber at the other side of the rear wheel. The device comprises a cover member which covers the rear wheel from above and also covers portions of both sides of the rear wheel while accommodating the shock absorber therewithin, and a container member constructed integrally with the cover member and extending inside the cover member above the muffler.A dead space can be substantially eliminated from the rear cover device, and therefore substantially the entirety of the interior space can be utilized.

Abstract: An air sucking device for engines wherein the suction pipe, carburetor, and air cleaner are integrally connected together. The carburetor and suction pipe are housed within a covering so that the device affords protection and a favorable appearance for the respective components. The suction passageway is of a sufficient length to make operation of the engine more efficient.