Abstract: A brake caliper arrangement structure for a saddled vehicle, wherein a brake caliper for braking and a brake caliper for parking are provided on a swing arm. At least one or other of the brake caliper for braking and the brake caliper for parking is arranged in front of a rear axle being the axle of the rear wheel, when viewed from a side, at a position on a vehicle widthwise inside of the swing arm and overlapping the swing arm.

Abstract: A vehicular wheel is formed by casting and includes a hub; a rim; and a plurality of spokes which extend toward the rim in the radial direction from the hub and are arranged in the circumferential direction. The wheel further includes connecting portions on an inner peripheral surface of the rim respectively connecting the plurality of spokes to the rim. Weight-mounting surfaces are formed at the center of the inner peripheral surface of the rim in the widthwise direction and arranged between respective connecting portions. The weight-mounting surfaces are formed so as to be substantially parallel to a rotational center line of the wheel. A molding seam which is formed at an interface between split faces of a wheel mold is arranged at a position spaced away from the weight-mounting surface in the widthwise direction.

Abstract: A brake caliper includes: a caliper body which slidably houses a mechanically operated piston which presses a brake disc; a rotation cylinder member which is arranged alongside the mechanically operated piston, coaxially with the mechanically operated piston, and which is rotatably supported on the caliper body; a rotation arm which is fixed to the rotation cylinder member, and which rotates the rotation cylinder member by means of an operation of an operating element; a conversion mechanism which is provided between the rotation cylinder member and the mechanically operated piston, and which converts rotary motion of the rotation cylinder member into axial linear motion of the mechanically operated piston to thereby press and move the mechanically operated piston toward the brake disc side; and a return spring which biases the mechanically operated piston in a direction of moving away from the brake disc.

Abstract: A brake caliper arrangement structure for a saddled vehicle, wherein a brake caliper for braking and a brake caliper for parking are provided on a swing arm. At least one or other of the brake caliper for braking and the brake caliper for parking is arranged in front of a rear axle being the axle of the rear wheel, when viewed from a side, at a position on a vehicle widthwise inside of the swing arm and overlapping the swing arm.

Abstract: A brake caliper includes: a caliper body which slidably houses a mechanically operated piston which presses a brake disc; a rotation cylinder member which is arranged alongside the mechanically operated piston, coaxially with the mechanically operated piston, and which is rotatably supported on the caliper body; a rotation arm which is fixed to the rotation cylinder member, and which rotates the rotation cylinder member by means of an operation of an operating element; a conversion mechanism which is provided between the rotation cylinder member and the mechanically operated piston, and which converts rotary motion of the rotation cylinder member into axial linear motion of the mechanically operated piston to thereby press and move the mechanically operated piston toward the brake disc side; and a return spring which biases the mechanically operated piston in a direction of moving away from the brake disc.

Abstract: A vehicular wheel is formed by casting and includes a hub; a rim; and a plurality of spokes which extend toward the rim in the radial direction from the hub and are arranged in the circumferential direction. The wheel further includes connecting portions on an inner peripheral surface of the rim respectively connecting the plurality of spokes to the rim. Weight-mounting surfaces are formed at the center of the inner peripheral surface of the rim in the widthwise direction and arranged between respective connecting portions. The weight-mounting surfaces are formed so as to be substantially parallel to a rotational center line of the wheel. A molding seam which is formed at an interface between split faces of a wheel mold is arranged at a position spaced away from the weight-mounting surface in the widthwise direction.

Abstract: A shaft drive type motorcycle includes a drive shaft for permitting a reduction in the vehicle weight. The shaft drive type motorcycle includes a gear box provided at a rear part of a swing arm with a bearing provided between the gear box and a rear wheel axle. The bearing includes an outer race and balls and an inner race operative provided to rotatably support the rear wheel axle. A presser flange is provided between the rear wheel axle and a rear wheel that includes a hollow cylindrical part pressing the inner race in the axial direction of the rear wheel axle. A flange part is provided as part of the presser flange to which a brake disc is mounted. A labyrinth structure is provided for making it difficult for oil from leaking out of the gear box.

Abstract: A motorcycle includes a swing arm, a rear wheel mounted on a leading end of the swing arm, a drive shaft disposed in the swing arm, and a final gear transmission mechanism interposed between the drive shaft and the rear wheel. The final gear transmission mechanism includes a gear case mounted on the leading end of the swing arm for supporting a rear axle; a first end bearing and a second end bearing for supporting a first end and a second end of the rear axle, respectively, a ring gear mounted on the rear axle for transmitting the rotary drive force of an engine to the rear axle; a holding portion for holding the first end of the rear axle in the axial direction of the rear axle; and a fastening member for fastening the second end bearing to the second end of the rear axle.

Abstract: A shaft drive type motorcycle includes a drive shaft, a constant-velocity universal joint interposed in the drive shaft, and the pinion gear provided at one end of the drive shaft and meshed with a final gear. A shaft part may be extended from a cup of the constant-velocity universal joint, the shaft part is provided with male splines, and a tubular part extends from the pinion gear. The tubular part is provided with female splines in which to fit the male splines, and the male splines and the female splines are coupled with each other.

Abstract: To provide a rear swing arm installation structure that does not require large tightening force and upsizing and can avoid backlash of a rear swing arm. In a rear swing arm installation structure, a cylindrical spacer into which a pivot shaft is inserted is screwed into the pivot bearing holes of a pair of vehicle body frames. The spacer includes a head section of a large diameter and a screw section having a smaller diameter than the head section. The head section touches an end face of the pivot bearing hole of the vehicle body frame and the tip of the screw section touches an end face of a rear swing arm.

Abstract: A brake support structure for effectively utilizes a space is disposed so as to be hardly visible in appearance. In addition, the brake support structure protects the pipes. A brake support structure includes a vehicle frame having rear frames extending from main frames with a swing arm having a front end pivotally supported on the rear frames and a rear end for rotatably supporting a rear wheel. Brake pipes are connected to a brake caliper for braking the rear wheel. An upper cross member interconnects the rear frames and is disposed near the swing arm. The brake pipes extend between the upper cross member and the swing arm.

Abstract: A shaft type motorcycle includes a drive shaft for permitting a reduction in the vehicle weight. The shaft drive type motorcycle includes a gear box provided at a rear part of a swing arm with a bearing provided between the gear box and a rear wheel axle. The bearing includes an outer race and balls and an inner race operative provided to rotatably support the rear wheel axle. A presser flange is provided between the rear wheel axle and a rear wheel that includes a hollow cylindrical part pressing the inner race in the axial direction of the rear wheel axle. A flange part is provided as part of the presser flange to which a brake disc is mounted. A labyrinth structure is provided for making it difficult for oil from leaking out of the gear box.

Abstract: A shaft drive type motorcycle includes a drive shaft, a constant-velocity universal joint interposed in the drive shaft, and the pinion gear provided at one end of the drive shaft and meshed with a final gear. A shaft part may be extended from a cup of the constant-velocity universal joint, the shaft part is provided with male splines, and a tubular part extends from the pinion gear. The tubular part is provided with female splines in which to fit the male splines, and the male splines and the female splines are coupled with each other.

Abstract: A motorcycle includes a swing arm, a rear wheel mounted on a leading end of the swing arm, a drive shaft disposed in the swing arm, and a final gear transmission mechanism interposed between the drive shaft and the rear wheel. The final gear transmission mechanism includes a gear case mounted on the leading end of the swing arm for supporting a rear axle; a first end bearing and a second end bearing for supporting a first end and a second end of the rear axle, respectively, a ring gear mounted on the rear axle for transmitting the rotary drive force of an engine to the rear axle; a holding portion for holding the first end of the rear axle in the axial direction of the rear axle; and a fastening member for fastening the second end bearing to the second end of the rear axle.

Abstract: A support section structure for a swing arm provides a well-balanced state for the weight of the vehicle in a widthwise direction and for efficiently increasing the rigidity of a vehicle body frame without inviting a significant increase in the weight of the vehicle body. A swing arm is provided for supporting a rear wheel Wr for rotation and is supported for a rocking motion on a center frame. An output power shaft of a power source is transmitted to the rear wheel Wr through a drive shaft. A left outer side frame and a intermediate frame, which support a front end portion of the swing arm for pivotal motion, are provided on the center frame. A right outer side frame disposed on the outer side in the vehicle widthwise direction with respect to the drive shaft on the intermediate frame is provided integrally against removal on the center frame.

Abstract: A radially mounted disk brake has a caliper body secured to a support member secured to a vehicle body. The caliper body has mounting holes extending in a direction perpendicular to the axis of rotation of a disk rotor. Large-diameter hole portions are formed at the openings of the mounting holes on the side thereof closer to the support member. The large-diameter hole portions are fitted with the side wall surfaces of cylindrical step portions provided on the support member in such a manner that gaps are formed between the bottoms of the large-diameter hole portions and the distal end surfaces of the step portions. The center of the axial length of each mounting hole is positioned radially outward of the disk rotor in the axial direction of the mounting hole with respect to a shortest-distance portion of the caliper body at which the distance between the center of a cylinder bore and the mounting hole is shortest.

Abstract: A disc brake in which three pistons are arranged respectively on both sides of a brake disc to miniaturize the disc brake and to enhance the merchantability of a motorcycle by simplifying the appearance shape of the disc brake. A first oil passage provides a communication with first and second oil pressure chambers respectively facing back surfaces of the first and second pistons. A second oil passage provides a communication with third, fourth, fifth and sixth oil pressure chambers respectively facing back surfaces of the third to sixth pistons. The first and second oil passages are formed inside of a caliper body.

Abstract: A front disk brake includes a brake caliper having a pair of caliper side mount portions, and a caliper bracket having a pair of bracket side mount portions. The brake caliper includes an oblong-shared lower-side counterbore and a circular-shaped upper-side counterbore, the lower-side counterbore being oblong sectional shaped in the arrangement direction of the lower-side counterbore and the upper-side counterbore paired therewith. The caliper bracket includes lower-side and upper side circular-shaped counterbores which are opposed, respectively, to the counterbores of the brake caliper. The brake caliper is fixed to the caliper bracket by mounting fastening bolts in bolt passing holes and screw holes formed respectively in the mount portions. The bolt passing holes and the screw holes are provided at their portions on the sides of opposed surfaces with counterbores in which collar members are to be fitted.

Abstract: A motorcycle includes radial mount type disk brakes, a brake caliper of the disk brake is mounted on a lower portion of a front fork, which pivotably supports a front wheel, the wheel speed sensor is attached to a mounting boss disposed at the lower portion of one leg of the front fork so as to dispose the wheel speed sensor between the brake caliper and the wheel axle. This mounting location is desirable in terms of lowering costs and ease of brake maintenance.

Abstract: A brake support structure for effectively utilizes a space is disposed so as to be hardly visible in appearance. In addition, the brake support structure protects the pipes. A brake support structure includes a vehicle frame having rear frames extending from main frames with a swing arm having a front end pivotally supported on the rear frames and a rear end for rotatably supporting a rear wheel. Brake pipes are connected to a brake caliper for braking the rear wheel. An upper cross member interconnects the rear frames and is disposed near the swing arm. The brake pipes extend between the upper cross member and the swing arm.