Abstract: A fuel injection control system for a motorcycle includes an ECU (Engine Control Unit) which calculates the amount of fuel to be injected by an injector based on data detected by various sensors. The fuel injection control system also includes a generator which supplies electric power to the injector and the ECU, and is driven in accordance with the engine, and a kick pedal for manually starting the engine by manually driving the generator with a user's foot. The ECU is configured to acquire data detected by the sensors at shorter intervals during a predetermined period before starting the engine than after the engine is started.

Abstract: The intake manifold assembly comprises three blocks each molded from a plastic material by injection molding, the three blocks consisting of a first block defining a half of the surge tank, a second block defining a half of the individual intake pipes and a third block defining a remaining half of the surge tank and a remaining half of the individual intake pipes. Thereby, the intake manifold assembly may be provided with various features for defining a pair of intake pipe sections arranged in a mutually parallel relationship while being made to be suitable for an injection molding process. Because the surge tank are defined by the first and third blocks while the individual intake pipes are defined by the second and third blocks, the intake manifold assembly essentially consisting of three blocks can internally define essential features required for a dual port intake device without requiring additional component members.

Abstract: A tool fixture for enabling a mechanic to manually rotate an internal combustion engine which comprises an assembly of components which is placed inside a starter motor housing. The assembled combination of the starter motor housing with the present invention is then attached to the engine's bell housing where the starter motor would normally reside. The gear teeth of the engine flywheel engages a gear fixedly mounted on a first end of a rotatable shaft of the present invention. A nut is fixedly mounted on a second end of the rotatable shaft which is accessible to a mechanic's wrench so that torque may appropriately be applied to the rotatable shaft which accordingly permits the fly wheel to be rotated slowly to any desired position as may be required so as to facilitate for the tuning and other adjustment procedures to be performed upon the engine.