Abstract: An intake duct has a front-rear two-split structure, and includes a rear duct connected to a body frame and a front duct connected to the rear duct. The rear duct includes a body frame connection portion that is connected to the body frame and is attached with a rear stay that supports a cowl and a meter, and the front duct is directed forward from the rear duct.

Abstract: A motorcycle includes a stay, which supports an electric component, an exterior component, and the like, on a front portion of a head tube of a body frame. The stay includes an upper-portion triangular frame body having a triangular shape from a V-shaped portion of a main stay and an upper stay, and at least a part of an ECU supporting portion, which supports an ECU, is disposed inward of the upper-portion triangular frame body. One apex of the upper-portion triangular frame body is positioned on a vehicle front side.

Abstract: In an intake device, an upper fuel injection device that injects a fuel and a suction port that suctions the air-fuel mixture supplied to a cylinder head are disposed in the air cleaner. The intake device includes the air cleaner including an air cleaner case and a sidewall filter that purifies an air suctioned into the air cleaner case. The sidewall filter partitions a space in the air cleaner case in a vehicle width direction, and has at least partially overlapping with the upper fuel injection device in the vehicle width direction.

Abstract: An intake duct has a front-rear two-split structure, and includes a rear duct connected to a body frame and a front duct connected to the rear duct. The rear duct includes a body frame connection portion that is connected to the body frame and is attached with a rear stay that supports a cowl and a meter, and the front duct is directed forward from the rear duct.

Abstract: A motorcycle includes a stay, which supports an electric component, an exterior component, and the like, on a front portion of a head tube of a body frame. The stay includes an upper-portion triangular frame body having a triangular shape from a V-shaped portion of a main stay and an upper stay, and at least a part of an ECU supporting portion, which supports an ECU, is disposed inward of the upper-portion triangular frame body. One apex of the upper-portion triangular frame body is positioned on a vehicle front side.

Abstract: In an intake device, an upper fuel injection device that injects a fuel and a suction port that suctions the air-fuel mixture supplied to a cylinder head are disposed in the air cleaner. The intake device includes the air cleaner including an air cleaner case and a sidewall filter that purifies an air suctioned into the air cleaner case. The sidewall filter partitions a space in the air cleaner case in a vehicle width direction, and has at least partially overlapping with the upper fuel injection device in the vehicle width direction.

Abstract: A saddle type vehicle wherein restrictions in the weight and the layout are reduced for slimmer and lighter vehicle. Pivot plates are provided as separate bodies from seat rails. An upper end of a shock absorber is received by a cross member located between left and right seat rails. The cross member is a separate body from the seat rails. Both ends of the cross member are supported by recesses provided in the left and right seat rails at inner sides of the seat rails so as to face each other. The cross member is fastened to the seat rails by cross member fastening members. The seat rail is attached to a main frame at its one front-side end and to the pivot plate at its other front-side end. The main frame and the seat rail are fastened to each other in the vertical direction by a first fastening member.

Abstract: A saddle type vehicle to improve the workability in fastening a frame and an engine together and thereby to enhance productivity. The saddle type vehicle includes a head pipe, a main frame extending rearwardly from the head pipe, and a seat rail located rearwardly of the main frame for supporting a seat. The main frame is fastened to the engine by fastening members being directed from an outer side toward an inner side in the vehicle widthwise direction. A knock pin is provided between the main frame and the engine, in a position in the vicinity of at least one of the fastening members.

Abstract: A saddle type vehicle to improve the workability in fastening a frame and an engine together and thereby to enhance productivity. The saddle type vehicle includes a head pipe, a main frame extending rearwardly from the head pipe, and a seat rail located rearwardly of the main frame for supporting a seat. The main frame is fastened to the engine by fastening members being directed from an outer side toward an inner side in the vehicle widthwise direction. A knock pin is provided between the main frame and the engine, in a position in the vicinity of at least one of the fastening members.

Abstract: A saddle type vehicle wherein restrictions in the weight and the layout are reduced for slimmer and lighter vehicle. Pivot plates are provided as separate bodies from seat rails. An upper end of a shock absorber is received by a cross member located between left and right seat rails. The cross member is a separate body from the seat rails. Both ends of the cross member are supported by recesses provided in the left and right seat rails at inner sides of the seat rails so as to face each other. The cross member is fastened to the seat rails by cross member fastening members. The seat rail is attached to a main frame at its one front-side end and to the pivot plate at its other front-side end. The main frame and the seat rail are fastened to each other in the vertical direction by a first fastening member.

Abstract: A saddle-type vehicle has an engine-fastening structure which stabilizes a seating face contact between a collar and a vehicle body frame on one side, and between the collar and an engine on the other side. The vehicle includes a vehicle body frame having an engine-supporting portion, and an engine block having a female threaded portion formed therein for alignment with the engine-supporting portion. The collar is interposed between the engine-supporting portion and the engine block. The engine-supporting portion of the frame, the collar and the engine side female threaded portion are fastened together by a bolt. A gap is provided at least at locations between the collar and the bolt which oppose a boundary between the collar and the engine-supporting portion, and another boundary between the collar and the engine side female threaded portion.

Abstract: A brake apparatus for a two-wheeled vehicle includes a hydraulic brake, which receives a hydraulic force to thereby generate a braking force, and a braking force control unit, which controls the braking force by increasing or decreasing the hydraulic pressure. The two-wheeled vehicle includes an engine disposed between a front wheel and a rear wheel. The engine includes a crankcase disposed downward thereof and a cylinder extending upwardly from a front portion of the crankcase. The braking force control unit is disposed in a space surrounded by the cylinder at a position forward thereof and the crankcase at a position downward thereof, respectively. The brake apparatus for a two-wheeled vehicle is capable of promoting enhanced maneuverability, achieving sufficient durability performance, and improving electric connection performance.

Abstract: A motorcycle frame structure includes pivot plates at rear portions of left and right main frames extending rearwardly and downwardly from a head pipe. A seat rail is fastened to an upper portion of the pivot plate at two positions which are vertically spaced apart from each other, and also at the front end of the seat rail. A first attachment portion and a second attachment portion are attached to a front end of the seat rail. The first attachment portion is fastened to the pivot plate from the horizontally external side of the seat rail with a first bolt, and laterally overlaps a rear upper lateral surface of the pivot plate. The second attachment portion is fastened to the pivot plate from the rear side of the pivot plate with a second bolt, and overlaps a rear portion of the pivot plate.

Abstract: A saddle-type vehicle has an engine-fastening structure which stabilizes a seating face contact between a collar and a vehicle body frame on one side, and between the collar and an engine on the other side. The vehicle includes a vehicle body frame having an engine-supporting portion, and an engine block having a female threaded portion formed therein for alignment with the engine-supporting portion. The collar is interposed between the engine-supporting portion and the engine block. The engine-supporting portion of the frame, the collar and the engine side female threaded portion are fastened together by a bolt. A gap is provided at least at locations between the collar and the bolt which oppose a boundary between the collar and the engine-supporting portion, and another boundary between the collar and the engine side female threaded portion.

Abstract: A mold and a die-cast manufacturing method for the die-cast product, in which a main frame which is contiguously formed with a head pipe constitutes a portion of a hollow light-weight-metal-made vehicle-body frame. The mold includes a core for forming an inner space of the hollow vehicle-body frame. The core includes a core body and a plurality of splints mounted on the core body, the splints having approximately elliptical cross-sectional shapes. The long axes direction of ellipses of the splints are set parallel to a mold split surface of the mold. As a result, measurement of the positional accuracy of the splints is facilitated, a clearance between the splint and the mold can decrease by increasing the dimensional accuracy of splint mounting portions of the mold based on sizes of the splints, and the frame can be manufactured with high dimensional accuracy.

Abstract: To arrange a steering damper behind a head pipe in a compact manner while suppressing the influence of the steering damper on an intake duct which penetrates the vicinity of head pipes of a vehicle body frame. A steering damper is arranged between left and right main frames of a vehicle body frame and, at the same time, is arranged above or below an intake duct which penetrates the vicinity of a head pipe of the vehicle body frame.

Abstract: A motorcycle frame structure includes pivot plates at rear portions of left and right main frames extending rearwardly and downwardly from a head pipe. A seat rail is fastened to an upper portion of the pivot plate at two positions which are vertically spaced apart from each other, and also at the front end of the seat rail. A first attachment portion and a second attachment portion are attached to a front end of the seat rail. The first attachment portion is fastened to the pivot plate from the horizontally external side of the seat rail with a first bolt, and laterally overlaps a rear upper lateral surface of the pivot plate. The second attachment portion is fastened to the pivot plate from the rear side of the pivot plate with a second bolt, and overlaps a rear portion of the pivot plate.

Abstract: To easily secure a welding length when an opening is formed at a portion in the vicinity of a joint portion between a head pipe portion and a main frame portion. A front opening penetrating through a vehicle body frame across a head pipe portion and a main frame portion. A rib extending across the front opening along a front parting plane of the vehicle body frame. The rib being divided along the front parting plane and the edge portions of the divided rib portions opposing the outer periphery of the main frame portion are integrally joined.

Abstract: An intake duct structure having an intake path extending forwardly from a cleaner box, penetrating through an area near a head pipe of a vehicle body frame, and opening at a front end portion of a front cowl. During low speed operation of the engine, an intake valve closes a main intake path MR from a front end intake port and opens a sub-intake path SR from a lower portion intake port. On the other hand, during high speed operation of the engine, the intake valve opens the main intake path MR and closes the sub-intake path SR. The lower portion intake port opens forward of a head pipe inside a front cowl and obliquely downwardly toward the rear. With this arrangement, entry of rainwater into the intake path can be minimized during low speed operation of the engine.

Abstract: A frame structure for a motorcycle includes a front fork which journals a front wheel and that is capable of being steered and supported by a head pipe. Front end portions of a pair of right and left pipe members are connected contiguously to the head pipe and extend downwardly and rearwardly from the head pipe. The pair of right and left pipe members each have a substantially prismatic cross sectional shape and are each bent at their longitudinally intermediate portions so as to be outwardly convex with respect to the sides of the motorcycle frame. An engine is disposed between lower portions of both pipe members in an engine mounting space. The present invention narrows the distance between the upper portions of the right and left pipe members and effectively increases the space between the lower portions of the pair of right and left pipe members.