Abstract: An engine controller structure for a vehicle, can include a duct cover having a box-like portion on a vehicle body front side thereof. The box-like portion can include an opening formed therein, and can be configured to have an intake duct of an engine connected thereto. The duct cover can be configured to be positioned sidewardly of an engine. An engine control unit can be disposed on the inside of the duct cover. The opening, configured to be connected to the intake duct, can be configured such that the intake duct is connected to an air cleaner box attached to a vehicle body rear side of the engine. The intake duct can shaped so as to be extended to a vehicle body front side from the air cleaner box.

Abstract: A frame structure is provided in which a sub-frame is fixed to a rear portion of a vehicle body frame, and serves as a suspension-supporting portion of the vehicle body frame. In the sub-frame, a rear member extends between a sub-frame upper pipe and a sub-frame lower pipe. The rear member includes a rear upper arm supporting portion and a rear lower arm supporting portion, for supporting proximal ends of an upper arm and a lower arm of a rear suspension. The frame structure hereof improves accuracy and rigidity of the suspension-supporting portion of the vehicle body frame, and provides a simplified structure as compared to conventional frame structures.

Abstract: An engine controller structure for a vehicle, can include a duct cover having a box-like portion on a vehicle body front side thereof. The box-like portion can include an opening formed therein, and can be configured to have an intake duct of an engine connected thereto. The duct cover can be configured to be positioned sidewardly of an engine. An engine control unit can be disposed on the inside of the duct cover. The opening, configured to be connected to the intake duct, can be configured such that the intake duct is connected to an air cleaner box attached to a vehicle body rear side of the engine. The intake duct can shaped so as to be extended to a vehicle body front side from the air cleaner box.

Abstract: A suspension structure is configured to ensure a large stroke of a shock absorber in a suspension device without moving an upper end supporting position of a damper upward relative to a conventional mounting position. The suspension structure includes a rear suspension for suspending left and right rear wheels. The rear suspension includes left and right lower arms for supporting the left and right rear wheels by way of knuckles, and left and right rear shock absorbers interposed between the respective lower arms and a sub-frame of a vehicle body frame. A lower end connecting portion of the rear shock absorber is cantilevered to a front side of the lower arm.

Abstract: A vehicle body frame structure for an all-terrain vehicle having at least a front wheel, and including a first frame assembly and a second frame assembly. The first frame assembly includes an arm support portion and a steering shaft support portion located at a front portion of the vehicle body frame structure, for steering the front wheel. The second frame assembly is bisected from the first frame assembly; and the vehicle body frame structure also includes a suspension arm vertically swingably supported by the arm support portion.

Abstract: An air cleaner box structured to facilitate the attaching and detaching operation of an air cleaner element While enhancing the support rigidity thereof. The air cleaner box includes a casing having a case body and the openable and closable case cover. The air cleaner element and the element holder to support the air cleaner element are contained in the casing. The element holder has an extended U-shape in cross section, and has end sections that are supported by the case body and the case cover respectively. The element holder pivots on the bottom face rear ends of the holder lower protrusions in an inclinable manner.

Abstract: A saddle ride type four-wheel vehicle includes an electronic control type fuel injection system in a fuel supply system for an engine mounted thereon, wherein a fuel pump is disposed on the rear side relative to the rotational center axis of front wheels and on the front side relative to the engine.

Abstract: A saddle ride type all-terrain vehicle having an engine and a saddle type driver's seat, includes a first sensor for detecting an inclination in the left-right direction of the vehicle, a second sensor for detecting an inclination in the front rear direction of the vehicle, and a controller receiving outputs from the first and second sensors, determining a tumble condition based on the outputs, and then outputting a tumble condition signal. Further, a fuel shut-off element is provided for shutting off the supply of fuel to the engine when the tumble condition signal is received from the controller.

Abstract: A saddle-ride type vehicle eliminates the input of disturbances to a throttle body upon opening/closing of a vehicle seat, and is capable of reliably protecting an injector. An air cleaner 18 is disposed on the rear side of an engine 5, a fuel tank 22 is disposed above the engine 5, and a seat 23 is disposed on the rear side of the fuel tank 22 such that the seat 23 can be opened or closed. A throttle body 17 having an injector 17a is disposed in a space below the seat 23 and between the engine 5 and the air cleaner 18. A protector cover 80 covers the throttle body 17 from the upper side.

Abstract: A lean detector for a vehicle is capable of reducing the cost of the parts of a lean sensor and enhancing the waterproof property thereof. The lean detector also detects when the leaning of the vehicle body has reached a prescribed angle in the right, left, front or rear direction. The lean sensor is installed at a position above a bottom end of a baseplate of the seat of a saddle-ride type four-wheeled vehicle.

Abstract: A saddle ride type all-terrain vehicle includes an engine, a front wheel and rear wheels, a saddle type rider's seat, and a rear fender provided so as to cover the surroundings of the saddle type rider's seat and the rear wheels. The vehicle further includes an exhaust pipe led out to the vehicle body rear side from the engine, a muffler connected to the exhaust pipe, and an oxygen concentration sensor provided in the vicinity of a connection portion between the exhaust pipe and the muffler, wherein the oxygen concentration sensor is located inside the rear fender.

Abstract: A saddle-ride type vehicle provided with an air cleaner at the rear side of an engine and a fuel tank at the upper side of the engine, and a heat shield panel disposed between the fuel tank and the engine. A fuel feed pipe, one end of which is connected to a fuel pump located at the front side of the engine, extends toward the upper part of the heat shield panel and is routed on the upper side of the heat shield panel and connected to an injector which forms a fuel intake. This improves the degree of freedom in the design around an engine and facilitates the layout of a fuel feed pipe that connects a fuel pump to a fuel intake at the front and rear of the engine so that the fuel feed pipe is hardly affected by the heat of the engine.

Abstract: A throttle body is connected to a rear portion of a cylinder head of an air-cooled engine, and a fuel pump is disposed in front of the engine. The fuel pump is such as to be disposed below a fuel tank 6 such a manner as to be separated therefrom and to be integrated with an auxiliary tank. Fuel is sent under pressure from the fuel pump to the throttle body via a fuel feed tube, and surplus fuel is returned to the integrated auxiliary tank, consequently, no piping for return fuel being required. Vapor generated in the fuel 23 returns to a space above a fuel level resulting when the fuel tank 6 is filled up via an exclusive return tube and is, therefore, prevented from mixing into fuel.

Abstract: A suspension structure is configured to ensure a large stroke of a shock absorber in a suspension device without moving an upper end supporting position of a damper upward relative to a conventional mounting position. The suspension structure includes a rear suspension for suspending left and right rear wheels. The rear suspension includes left and right lower arms for supporting the left and right rear wheels by way of knuckles, and left and right rear shock absorbers interposed between the respective lower arms and a sub-frame of a vehicle body frame. A lower end connecting portion of the rear shock absorber is cantilevered to a front side of the lower arm.

Abstract: A frame structure is provided in which a sub-frame is fixed to a rear portion of a vehicle body frame, and serves as a suspension-supporting portion of the vehicle body frame. In the sub-frame, a rear member extends between a sub-frame upper pipe and a sub-frame lower pipe. The rear member includes a rear upper arm supporting portion and a rear lower arm supporting portion, for supporting proximal ends of an upper arm and a lower arm of a rear suspension. The frame structure hereof improves accuracy and rigidity of the suspension-supporting portion of the vehicle body frame, and provides a simplified structure as compared to conventional frame structures.

Abstract: An air cleaner box structured to facilitate the attaching and detaching operation of an air cleaner element While enhancing the support rigidity thereof. The air cleaner box includes a casing having a case body and the openable and closable case cover. The air cleaner element and the element holder to support the air cleaner element are contained in the casing. The element holder has an extended U-shape in cross section, and has end sections that are supported by the case body and the case cover respectively. The element holder pivots on the bottom face rear ends of the holder lower protrusions in an inclinable manner.

Abstract: A lean detector for a vehicle is capable of reducing the cost of the parts of a lean sensor and enhancing the waterproof property thereof. The lean detector also detects when the leaning of the vehicle body has reached a prescribed angle in the right, left, front or rear direction. The lean sensor is installed at a position above a bottom end of a baseplate of the seat of a saddle-ride type four-wheeled vehicle.

Abstract: A saddle-ride type vehicle provided with an air cleaner at the rear side of an engine and a fuel tank at the upper side of the engine, and a heat shield panel disposed between the fuel tank and the engine. A fuel feed pipe, one end of which is connected to a fuel pump located at the front side of the engine, extends toward the upper part of the heat shield panel and is routed on the upper side of the heat shield panel and connected to an injector which forms a fuel intake. This improves the degree of freedom in the design around an engine and facilitates the layout of a fuel feed pipe that connects a fuel pump to a fuel intake at the front and rear of the engine so that the fuel feed pipe is hardly affected by the heat of the engine.

Abstract: A saddle-ride type vehicle eliminates the input of disturbances to a throttle body upon opening/closing of a vehicle seat, and is capable of reliably protecting an injector. An air cleaner 18 is disposed on the rear side of an engine 5, a fuel tank 22 is disposed above the engine 5, and a seat 23 is disposed on the rear side of the fuel tank 22 such that the seat 23 can be opened or closed. A throttle body 17 having an injector 17a is disposed in a space below the seat 23 and between the engine 5 and the air cleaner 18. A protector cover 80 covers the throttle body 17 from the upper side.

Abstract: A throttle body 12 is connected to a rear portion of a cylinder head 10 of an air-cooled engine 5, and a fuel pump 23 is disposed in front of the engine 5. The fuel pump 23 is such as to be disposed below a fuel tank 6 in such a manner as to be separated therefrom and to be integrated with an auxiliary tank. Fuel is sent under pressure from the fuel pump 23 to the throttle body 12 via a fuel feed tube 13, and surplus fuel is returned to the integrated auxiliary tank, consequently, no piping for return fuel being required. Vapor generated in the fuel pump 23 returns to a space above a fuel level resulting when the fuel tank 6 is filled up via an exclusive return tube 25 and is, therefore, prevented from mixing into fuel.