Abstract: A motorcycle frame is formed of tubular members which are hollow to provide a reservoir for oil used to lubricate the motor of the motorcycle. Fittings are provided within the tubular frame for receiving an oil filler cap, an oil spill hole, an outlet to the oil pump, an oil return inlet, an oil drain, and a crankcase vent. The seating area of the motorcycle frame is dropped closer to the ground due to the elimination of the oil reservoir normally located below the seating area of the frame, while incorporating a dampened rear wheel swing arm frame.

Abstract: A method and apparatus for mounting an oil cooler to a motorcycle having a regulator. The method includes the steps of detaching the regulator from the first location on the motorcycle, mounting the oil cooler to the motorcycle substantially at the first location, and relocating the regulator to a second location on the motorcycle. The invention may be provided in an oil cooler adapter kit including an oil cooler and a mounting bracket having a frame mount portion, an oil cooler mount portion, and a regulator mount portion. The kit may further include spacers that extend from the frame to the regulator mount portion of the mounting bracket.

Abstract: A shroud is disposed outside a radiator. Ribs are provided which project from the inner surface of the shroud and abut the outer surface of the radiator so that portions other than the ribs are used as baffle passages for introducing running an air flow into air flow ports. Guide ribs for introducing an air flow in the air flow ports are provided which project from an inner surface of the shroud in front of the radiator, thereby enhancing the rectifying effect.

Abstract: To increase the surface area of an oil cooler and improve the cooling efficiency of an engine for a motorcycle, dual radiators are mounted on the body frame on both right and left sides of a water-cooled engine. Both radiators are inclined relative to a center line of the motorcycle with the larger space between the top ends thereof than the space between the bottom ends thereof on both sides of the engine. Also, the forward portions of the radiators project forwardly from the front end of the engine. An air-cooled oil cooler is provided at the upper space between both radiators in front of the engine and extends laterally across the width of the engine. Furthermore, a cooling system incorporates the radiator and oil cooler configuration.

Abstract: An electrically operated saddle type vehicle includes a vehicle frame having at least one front wheel supported on a front wheel supporting member mounted adjacent to a front portion of the vehicle frame and at least one rear wheel supported on a rear wheel supporting member mounted adjacent to a rear portion of the vehicle frame. An electric motor is supported on the vehicle frame between the front wheel and the rear wheel and includes a front portion positioned adjacent to the front wheel. A transmission member is operatively connected to the electric motor and at least one of the front and rear wheels for providing propulsion for the vehicle. Wherein air is directed to contact the electric motor while the vehicle is in motion for cooling the electric motor during use.

Abstract: A system is set forth for cooling the circulating oil of an air cooled motorcycle engine having an oil pump and a mount for an oil filter, oil from the pump delivered to the filter and from the filter back to the engine for re-circulation. The system includes an engine guard secured to the motorcycle, at least a portion of the guard defining a closed chamber having a supply end and a return end. A diverter disposed between the filter and mount is adapted to direct oil to the chamber supply end, through the chamber for cooling thereof and, from the return end back to the diverter for supply to the filter and return to the engine. An adapter is disposed between the diverter and filter for certain model engines to turn the mount, diverter filter assembly so that the system can be provided for these engines.

Abstract: A battery charger for an electric vehicle having a built-in heatsink provided with an air passage, and a built-in battery charger cooling fan for producing an air current through the air passage of the heatsink to cool the heatsink. The heatsink need not be provided with fins and hence the battery charger can be formed in a comparatively small size.

Abstract: An oil cooling apparatus for cooling oil contained in a motorcycle engine of a motorcycle includes a housing having a front wall, a bottom wall extending rearwardly from the front wall, and a pair of spaced apart side walls which attach respective sides of the front and bottom walls. The housing further includes an opening for accessing the interior of the housing, a plurality of inlet louvers formed in the front wall and a plurality of outlet louvers formed in the bottom wall. The arrangement is such that air enters the interior of the housing via the inlet louvers and exits the interior of the housing via the outlet louvers. A bracket mounts the housing on an engine of a motorcycle in a position such that the opening of the housing generally faces the engine. A radiator contained within the engine of the motorcycle is provided for cooling the motorcycle's engine. Tubing, in fluid communication with the engine whereby oil flows therethrough, is disposed within the radiator.

Abstract: An electrically operated saddle type vehicle includes a vehicle frame having at least one front wheel supported on a front wheel supporting member mounted adjacent to a front portion of the vehicle frame and at least one rear wheel supported on a rear wheel supporting member mounted adjacent to a rear portion of the vehicle frame. An electric motor is supported on the vehicle frame between the front wheel and the rear wheel and includes a front portion positioned adjacent to the front wheel. A transmission member is operatively connected to the electric motor and at least one of the front and rear wheels for providing propulsion for the vehicle. Wherein air is directed to contact the electric motor while the vehicle is in motion for cooling the electric motor during use.

Abstract: A fairing for a motorcycle includes a fairing cover extending from a front end of a frame for a motorcycle rearwardly to cover both sides of an engine operatively mounted adjacent to the front end of the frame of the motorcycle. A plurality of air flow apertures are provided in the fairing for reducing air resistance during cornering of the motorcycle. The plurality of air flow apertures are provided in substantially the entire surface of the fairing. The surface area occupied by the plurality of air flow apertures is more than approximately seventeen percent of the entire surface area of the fairing.

Abstract: The inlet and outlet passages communicating with a water-cooled engine oil cooler for a vehicle, such as a motorcycle, are arranged for bypass of a regulated amount of oil from the inlet passage to the outlet passage to enhance the flowability of the cooled oil. Provision is made for a replaceable flow control orifice between the oil inlet and outlet passages to regulate oil viscosity. Also described is an arrangement providing for mounting the cooler to the crankcase or oil pan surface whereby air flowing past the cooler during movement of the vehicle assists the effects of the cooling liquid.

Abstract: A motorcycle arrangement having a frame with an integral air inlet device that takes ram air and delivers it to the engine induction system. The frame air inlet device includes an enlarged portion that encircles components of the front wheel suspension so as to provide a large flow volume without interfering with the steering of the motorcycle.

Abstract: A motorcycle powered by a two cycle crankcase compression fuel injected internal combustion engine. The injection system for the engine includes a main fuel air/injector that injects fuel directly into the combustion chamber and a second or auxiliary fuel injector that injects fuel into the induction system for the engine. Control means control the fuel injectors so that the second or auxiliary fuel injector supplies fuel only during starting and high load, high speed conditions. The engine components are laid out in such a way that the spark plugs of the engine and the fuel injector will each be exposed to unobstructed air flow for cooling.

Abstract: An oil cooling device for a motorcycle engine operating by convection heat transfer with air outside the device. A fin arrangement may be included to enhance the rate of heat exchange. The device conforms to forward portions of the motorcycle frame. The location of the device allows air needed to cool the engine to flow by the device uninhibited. This location is also unobtrusive and thus does not detract from the motorcycle's overall appearance. The oil cooling device is activated by a thermovalve which opens whenever a chosen temperature range is attained. This device could be incorporated into a motorcycle at manufacture or be configured for addition to a motorcycle to improve oil cooling as an auxiliary oil cooler.

Abstract: A number of embodiments of motorcycle constructions having frame made up of box shaped cross section main frame members that extend downwardly and rearwardly at an acute angle to the head pipe. The radiator covers, seat and frame are configured and constructed in such a way as to provide a smooth continuous surface for gripping between the legs of a rider. In some embodiments, this continuous surface is provided by the frame, radiator covers and seat directly and in other embodiments covers are provided over the main frame members to provide the continuous surface either by separate elements or by extension of the radiator covers.

Abstract: A motorcycle covered by a cowl includes a power unit comprising an engine and a power transmission device enclosed by a cover within which an engine fan induces cooling air into heat transfer relation with said engine. A muffler device enclosed by the cowl has an air guide cover within which cooling air inducted into the power unit cover is passed thereinto in order to cool the muffler. According to an aspect of the invention the vehicle body frame has a hollow main frame operative to induce a flow of cooling air and for discharging it into cooling relation with the power transmission device.

Abstract: A water cooled motorcycle wherein a curved radiator is disposed behind the steering shaft and inclined substantially at the same angle as the steering shaft so as to provide adequate air flow through the radiator without the engine heat being transmitted from the external portion of the engine to the radiator. Other embodiments disclose the use of lower radiators and series or parallel flow paths between the upper and lower radiators.

Abstract: An automatic centrifugal clutch is arranged at the rear of an engine of a motorcycle, and a belt type continuously variable transmission and a gear type speed reduction device are arranged on opposite sides of the clutch whereby a space at the rear of the engine is effectively utilized, and a space for installing a kick starter is secured externally of the belt type continuously variable transmission. An output shaft of a reduction device and an intermediate shaft of the reduction device are arranged on opposite sides of a plane extending so as to include axes of a crankshaft and an input shaft whereby the longitudinal length of a power transmission device is shortened. An opening of a cooling air discharge passage is provided to face the automatic centrifugal clutch at the front end of the reduction device whereby the automatic centrifugal clutch can be effectively cooled while effectively utilizing the space.

Abstract: A motorcycle including a motorcycle body having a frame, front and rear wheels supported on the frame, a fuel tank, and an engine carried by the frame which is operable to receive fuel from the fuel tank and provides driving power for at least one of the wheels. An air exhaust facilitating, fuel tank and radiator shroud combination is provided to deflect radiator exhaust air laterally outwardly.

Abstract: An oil-cooled electric motor for a vehicle including a rotational shaft rotatably supported by a casing, a rotor fixed to the rotational shaft, a stator disposed around the outer circumference of the rotor and fixed to the casing, a coil wound around the stator, and oil receiver and an oil pump mounted in the lower portion of the casing. An oil path is formed in the upper portion of the casing with openings directing oil onto the coil. An oil guide extends from one side of the casing toward the coil. Oil is pumped onto the coil via the oil path by an oil pump.

Abstract: The inlet and outlet passages communicating with a water-cooled engine oil cooler for a vehicle, such as a motorcycle, are arranged for bypass of a regulated amount of oil from the inlet passage to the outlet passage to enhance the flowability of the cooled oil. Provision is made for a replaceable flow control orifice between the oil inlet and outlet passages to regulate oil viscosity. Also described is an arrangement providing for mounting the cooler to the crankcase or oil pan surface whereby air flowing past the cooler during movement of the vehicle assists the effects of the cooling liquid.

Abstract: A front fender for a front-forked vehicle includes longitudinally extending air passages having inlets which extend in front of the forwardly exposed portions of the vehicle fork to direct air around the fork and guide same toward the vehicle engine.

Abstract: A motorcycle fairing for enclosing the engine and other components of a motorcycle includes a pair of body portions, each of which has a forward segment and a rear segment connected by a leg receiving recess. Air introduced at the front of the fairing to cool the engine is released from the engine cavity at a point adjacent the leg recesses so that the laminar flow of air around the motorcycle is not disturbed by the leg recesses.

Abstract: A radiator device for a motorcycle operatively connected to an engine unit provided with a water jacket and in which cooling liquid circulates comprises a pair of first and second radiator units arranged bilaterally in upright fashion with respect to the motorcycle body. Each of the radiator units is composed of upper and lower tanks in an upright arrangement thereof, the upper tank of the first radiator unit having a top portion disposed at a level lower than a top portion of the upper tank of the second radiator unit. The cooling water directly introduced into the upper tank of the first radiator unit is then divided and one branch flow of the cooling water is fed into the upper tank of the second radiator unit through means of another water tube interconnecting the upper tanks of the first and second radiator units.

Abstract: Footwardly directed air conduting apparatus mounted on an engine guard frame surrounding a cylinder head portion of a flat engine mounted in front of a step of a motorcycle. A cover is mounted on the engine guard and covers the cylinder head portion. At air guide plate is rotatably mounted in a window-like opening in the cover in such a manner that the forward end moves to the outside and the rearward end moves to the inside of the cover. An over-center spring mechanism is provided between the rearward end of the plate and the inside of the cover.

Abstract: A motorcycle includes a substantially longitudinal frame, front and rear wheels rotatably supported on the frame, an engine mounted on the frame between the front and rear wheels, a rear fork supporting the rear wheel and vertically swingably mounted on a rear end of the frame, a rear fender disposed in the vicinity of an upper portion of the rear wheel and covering the upper portion of the rear wheel, and a fairing device having a ram air inlet port defined in a front portion thereof and extending from a position in front of the frame in covering relation to the engine toward a position above the rear wheel where the fairing device covers the rear fender in surrounding relation thereto. The fairing device cooperates with the rear fender in providing a discharge duct defining a discharge air passage therein and having an air discharge port defined in an open end portion thereof.

Abstract: A motorcycle having a swingable front frame, a stable, non-swingable main frame, a front cowling supported by the main frame and covering a forward part of the motorcycle and an extension projecting laterally outwardly from each side of the front cowling. An air stream rectifier is provided in each laterally projecting extension of the front cowling.

Abstract: A motorcycle exhaust pipe arrangement includes a frame having a head pipe, a main pipe, a down tube, at least one under pipe and a pair of center pipes. A fuel tank is operatively connected to the main pipe. An engine is mounted on the at least one under pipe and is disposed beneath the fuel tank. A seat is mounted adjacent said fuel tank and is disposed above the engine. A rear shock absorber is operatively mounted between the seat and the at least one under pipe for absorbing shock supplied to the seat. The rear shock absorber is centrally disposed relative to a longitudinal axis of the motorcycle. An exhaust pipe is connected to the engine and extends rearwardly therefrom, the exhaust pipe is disposed substantially at a midpoint of the rear shock absorber and extends substantially horizontally therefrom in the longitudinal direction of the motorcycle for lowering the center of gravity of the motorcycle and providing a symmetrical rigid frame for supporting the engine, fuel tank and seat.

Abstract: An autobicycle wherein the cooling effect is improved without particularly increasing the wind introducing area of the autobicycle. The autobicycle comprises a partition wall located between a rear portion of an engine carried on a body frame and a body side cover for partitioning the inside of the body side cover to define front and rear sectional chambers. The body side cover continuously covers a range at least from a side portion of the engine to a location below a seat supported above the body frame and has one or more air admitting holes perforated therein. Air admitted into the inside of the body side cover thus cools the engine and some other components of the autobicycle in the front chamber and independently cools different components in the rear chamber.

Abstract: Guide walls are extended upwardly along the side edges of a front fender mounted between a pair of front forks of a two-wheeled or three-wheeled vehicle. These guide walls streamline the air flowing along the front fender and cause the volume of air flowing toward an engine installation position to be increased. Disturbance of air due to the front forks can be reduced to a minimum by these guide walls and outer plates which are branched from the guide walls so as to cover the outer portions of the front forks so that the air resistance can be decreased. The guide walls reinforce the front fender and give them rigidity sufficient to prevent vibration of the front fender when the two-wheeled or three-wheeled vehicle is running.

Abstract: A body cover for a motor scooter vehicle with a rear cover for covering the engine unit. The rear cover has a projection in its upper portion over the rear wheel, the projection having an outlet. Accordingly, the heat generated from the engine unit may be well discharged through the outlet of the projection to the atmosphere.

Abstract: A motorcycle carrying a fuel tank of large capacity on a body frame, wherein the fuel tank is hung down to a position sideward of an engine and is divided in its structure to have right and left side sections, at least one of the two sections of the fuel tank being made pivotable to provide an easy access to other equipments for maintenance.

Abstract: The present invention is directed to a front cover for a multi-wheeled vehicle. Although such vehicles typically take the form of a motorcycle, motor scooter or a motor tri-cycle, no such limitations are inherent in the present invention. Rather, the present invention provides an aerodynamically efficient front cover for covering the front portion of such a multi-wheeled vehicle body forward of a head pipe and includes a front surface and at least two side surfaces. Auxiliary member such as headlights, radiators, horns or the like may be positioned within the protected area of the front cover. An inspection lid for covering the mounting portion of the handlebars and facilitating inspection of the auxiliary members is removably mounted between the opposite side surfaces of the front cover. Aternative embodiments include means of mounting a windshield and a headlight shield in a common plane and flush with the front cover.

Abstract: A motor vehicle with a riding saddle includes front and rear wheels, an engine, a front wheel steering device for steering the front wheel, a frame having an integral head pipe supporting the front wheel steering device, a rear fork having a front end pivotally mounted on the frame and a rear end supporting the rear wheel, and a cushioning unit having a front end pivotally coupled to the frame and a rear end coupled to the rear fork for relative angular movement. The cushioning unit extends substantially parallel to a longitudinal central axis of the motor vehicle an is displaced laterally from the longitudinal central axis, leaving a space on one side of the cushioning unit. The motor vehicle also includes accessories disposed in the space on one side of the cushioning unit. The frame includes main and down tubes extending downwardly and rearwardly from the upper and lower portions, respectively, of the head pipe. Each of the main and down tubes is composed of a pair of laterally spaced members.

Abstract: A fender apparatus for use with a saddle type vehicle having a vehicle body, an internal combustion engine mounted on the vehicle body, a driver's seat mounted on the vehicle body and a pair of rear wheels mounted on the vehicle body. The fender apparatus comprises a rear fender having a downwardly bent front wall located to the inside of the position of the rear wheel on each side of the vehicle body, such that air flows rearward past the engine and through the through openings to dissipate heat generated by the engine.

Abstract: A four-wheel buggy with a riding saddle seat includes a vehicle frame, a pair of front wheels and a pair of rear wheels rotatably suspended from the vehicle frame and projecting laterally from the vehicle frame. An air-cooled engine is mounted on the vehicle frame substantially centrally in the longitudinal direction of the vehicle frame. The four-wheel buggy also includes a pair of foot steps, a driver's seat mounted on an upper portion of the vehicle frame and supported by the vehicle frame, a handlebar operatively connected to the vehicle frame for steering the front wheels, and a body cover attached to the vehicle frame. The four-wheel buggy further includes a cooling fan unit mounted on the vehicle frame and including a fan and a drive unit for rotating the fan, and a control system for controlling the drive unit. The cooling fan unit is disposed in front of the engine for directing air from the cooling fan unit toward the engine.

Abstract: Several embodiments of balloon tired, off the road vehicles embodying improved cooling systems. In each embodiment, the engine is surrounded by a cooling shroud and a fan is provided for driving air across the engine. The fan is offset from the engine crankshaft axis and is driven by it. In some embodiments, foreign matter is precluded from entry into the shroud inlet by positioning the inlet in a protected area such as over the fender, under the body, under the fuel tank, or under the seat.

Abstract: A heated air ducting structure (20; 200; 300; 360; 400) for motor cycles (50; 350; 450) including an engine (2; 302) mounted at a lower position in the front part of a vehicle body frame (1) and a a rider's seat (4; 401) installed on the vehicle body frame behind the engine. The ducting structure comprises a duct (20a; 208, 208r, 205a, 205c; 321, 314; 361, 365; 404, 405, 409) having a heated air entry (20b; 208c; 322; 362; 407) which, facing a rear portion (2b; 302g) of the engine, takes in heated air that has cooled the engine, and a heated air exit (20c; 205f; 328; 365b; 409b) which opens in the rearward direction of the vehicle.

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 motorcycle having an improved frame and fuel tank arrangement that define a ram air inlet channel for delivering cooling air to the engine induction system.

Abstract: A motorcycle including a pair of right and left main frame members, an engine being disposed at a lower part of the main frame members, a fuel tank being disposed at an upper part thereof, whereby the motorcycle is provided with a partition wall disposed between the main frame members and the engine. The upper part of this partition wall forms an air passage extending forward from backward of a vehicle body. At a rear portion of this air passage, a carburetor is exposed after penetrating the partition wall. The front end portion of the partition wall forms an air guiding portion extending to the front part of a radiator after riding over the radiator. The carburetor is effectively cooled by travelling air guided by the air passage via the air guiding portion. The partition wall also serves to prevent transmission of radiation of engine to the upper portion of the vehicle body.

Abstract: A body construction for a motor scooter vehicle, is supported by a vehicle frame assembly comprising a front frame having a head tube on a front end thereof and a rear frame, and comprises a front cover covering the head tube and a front half portion of the front frame, a central cover covering the rear frame, a floor panel disposed on a rear half portion of the front frame between the front cover and the central cover, and a pair of laterally spaced rear covers cooperating with the central cover in surrounding an engine and its exhaust system. The floor panel has at least a portion integral with the central cover. The rear covers are arranged to cover sides of the floor panel. Each of the rear covers has a side portion extending in covering relation to a side of the vehicle frame assembly, and a substantially flat upper portion bent inwardly from an upper edge of the side portion, the upper portion having at least one outlet opening defined therein for discharging hot air out of the rear cover therethrough.

Abstract: A motorcycle having a fairing and a radiator. The motorcycle includes a head pipe fixedly mounted on a front end of a motorcycle frame and inclined rearwardly with respect to a vertical line, a radiator disposed forwardly of the head pipe substantially parallel to an axis thereof and positioned in a plane lying normally to the longitudinal axis of a motorcycle body, and an instrument cluster unit disposed in a slanted plane extending upwardly and forward from above the radiator. A headlight is disposed in a recess defined between the instrument cluster unit and the radiator and having a substantially V shape as viewed in side elevation. A fairing covers the headlight, the radiator, and the instrument cluster unit.

Abstract: A fairing in a motorcycle includes a fairing body covering a motorcycle engine, an air outlet duct disposed in the fairing body and having an end opening at one side of the fairing body, a fan for assisting in discharging air through the air outlet duct out of the fairing body, and an electric motor for rotating the fan.

Abstract: A recreational vehicle having an enclosed, air cooled, variable speed, split sheave V-belt transmission. The transmission is enclosed by a housing having cooperatively located intake and exhaust ports connected respectively to intake and exhaust air conduits. One sheave of each pulley of the transmission includes a plurality of air propelling fins to generate air flow through the housing.

Abstract: A motorcycle includes a fuel tank mounted on a frame along a length thereof, and an elongated seat mounted on the frame above the fuel tank along the length of said frame, the seat having a bottom having a portion extending along the length thereof and disposed in spaced opposed relation to an upper surface of the fuel tank to form an air intake passageway therebetween. The passageway has an open front end opening toward the front end of the frame and having a rear open end. The seat has a front end disposed near a front end of the fuel tank so that the seat covers generally the entire upper surface of the fuel tank. An air cleaner is operatively connected to an engine and is disposed rearwardly of the fuel tank. The rear open end of the passageway is in communication with the air cleaner whereby the ambient air can be fed to the air cleaner through the air intake passageway.

Abstract: A frame for a motorcycle having a sealed cavity located within the down tube assembly. The down tube assembly includes two parallel down tubes with two cross members joining same. An inlet and outlet are associated with the cavity thus formed and are placed into communication with the exhaust and intake for lubricant to the engine. Thus, a lubricant supply reservoir is formed. A breather port is also included with the down tube assembly for exhausting gases from the lubricant reservoir. Additional frame construction is disclosed including frame joints, a rear carrier, a rear fender assembly and cross members therefor.

Abstract: A motorcycle includes a fuel tank mounted on a frame along a length thereof, and an elongated seat mounted on the frame above the fuel tank along the length of said frame, the seat having a bottom having a portion extending along the length thereof and disposed in spaced opposed relation to an upper surface of the fuel tank to form an air intake passageway therebetween. The passageway has an open front end opening toward the front end of the frame and having a rear open end. The seat has a front end disposed near a front end of the fuel tank so that the seat covers generally the entire upper surface of the fuel tank. An air cleaner is operatively connected to an engine and is disposed rearwardly of the fuel tank. The rear open end of the passageway is in communication with the air cleaner whereby the ambient air can be fed to the air cleaner through the air intake passageway.

Abstract: A motorcycle includes a fuel tank mounted on a frame along a length thereof, and an elongated seat mounted on the frame above the fuel tank along the length of said frame, the seat having a bottom having a portion extending along the length thereof and disposed in spaced opposed relation to an upper surface of the fuel tank to form an air intake passageway therebetween. The passageway has an open front end opening toward the front end of the frame and having a rear open end. The seat has a front end disposed near a front end of the fuel tank so that the seat covers generally the entire upper surface of the fuel tank. An air cleaner is operatively connected to an engine and is disposed rearwardly of the fuel tank. The rear open end of the passageway is in communication with the air cleaner whereby the ambient air can be fed to the air cleaner through the air intake passageway.

Abstract: A motorcycle having an improved frame and fuel tank arrangement that define a ram air inlet channel for delivering cooling air to the engine induction system.