Yamaha Hatsudoki Kabushiki Kaisha

Yamaha Motor Company Ltd

Hiroshi Kimura

Shunji Minami

Hisashi Kazuta

Kazuhiko Nomura

In a motorcycle having a main frame, a seat support on the frame, and a seat mounted to the seat support. The seat support is at least partially separable from the main frame so as to provide ready access to stored items or for maintenance and repair of motorcycle elements beneath the seat. The seat support is made separable by separable fasteners, or by hinges or pivot pins. The seat support can also serve as the mount for a rear fender. It can be made in a monocoque configuration for improved rigidity, and even for storage such as for a fuel tank.

Motorcycle fuel system with flow from a main tank through a lower

Several embodiments of induction systems having forced induction and a regulated fuel pump for delivering fuel to the charge forming device at a pressure that is related to the pressure in the induction system. In some embodiments the pressure is sensed above the level of the fuel in the fuel bowl of the charge forming device, and in others the pressure is sensed in a plenum chamber upstream of the charge forming device inlet. A check valve arrangement is also provided in the fuel line in one embodiment for preventing the backflow of fuel under conditions when the engine is stopped.

Device for supplying fuel to a pressure carburetor

Two embodiments of turbo-charged motorcycle arrangements wherein the turbo-charger is located so as to be protected by the stand of the motorcycle when the stand is in its retracted position.

Engine intake system for motorcycles

A motorcycle construction embodying a turbo-charger that is fed by means of a collector pipe positioned beneath the engine. The turbo-charger is positioned between the engine and the rear wheels and a splash shield extends between the rear wheel and the turbo-charger so as to protect it.

Motorcycle with turbo-charger

A lubricating system for turbo-charger wherein the turbo-charger bearings are located at or below the normal level of oil in the lubricating sump for return of oil from the sump to the turbo-charger bearings when the engine is not running so as to insure cooling of the bearings when the engine is not running.

Lubricating system for turbo-chargers

An induction system for a fuel injection V-type motorcycle engine has a pair of mixing bodies extending upwardly from the intake ports within the V formed by the cylinders. A surging tank is above the mixing bodies and below the fuel tank. An air intake passage is disposed alongside of the surging tank, and an air flow meter is disposed in the intake passage.

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Iwata, Japan

Hiroshi Kimura