Brake pipe structure of motorcycle

1. A brake pipe structure of a motorcycle in which a front fork by which a front wheel is rotatably supported and on whose upper end a handlebar is fixed is supported to be pivotable left and right about a steering shaft, by a head pipe provided at a front end of a body frame, a master cylinder attached to the handlebar and a hydraulic wheel braking part provided on the front wheel are connected via brake pipes, and an ABS unit for antilock braking mounted at a substantially center portion of the body frame is interposed, the brake pipe structure comprising:

a first brake pipe connecting the master cylinder and the ABS unit; and

a second brake pipe connecting the ABS unit and the hydraulic wheel braking part,

wherein the first brake pipe and the second brake pipe are suspended and held by the front fork and the body frame so as to pass under an under-bracket of the front fork pivotably supported by the head pipe,

wherein the master cylinder and the hydraulic wheel braking part are disposed on a handle grip part on a vehicle width direction of the one side, and on a front fork below the spring lower portion on a vehicle width direction of the other side respectively across the steering shaft, and

wherein, in a vehicle plane view, the first brake pipe and the second brake pipe are arranged so as to intersect in the vehicle width direction near the center axis of the steering shaft.

2. The brake pipe structure of the motorcycle according to claim 1 , wherein

the first brake pipe that connects its one-end to the master cylinder is arranged above in vehicles side view rather than the second brake pipe that connects its one-end to a hydraulic pressure wheel braking part.

3. The brake pipe structure of the motorcycle according to claim 2 , wherein:

a front half portion of the first brake pipe that hangs down in front of a steering shaft from the master cylinder arranged above of a front fork, said front half portion is held by a front part holding part provided in an under-bracket at least at forward side rather than the steering shaft being pivotable integrally to the front fork;

a rear half portion of the first brake pipe extending rearward in order to pass through the bottom of a under-bracket and to connect with the ABS unit, said rear half portion is held by a rear portion holding part provided in a back position rather than the steering shaft of the head pipe of a body frame; and

at least a part of the first brake pipe between the front part holding part and the rear portion holding part is formed by a flexible hose member.

4. The brake pipe structure of the motorcycle according to claim 2 , wherein:

the second brake pipe is held at the body frame by a rear portion holding part in which a rear half portion connected with the ABS unit is provided near the head pipe;

a front half portion which connects the second brake pipe to the wheel braking part of liquid pressure is held by a front part holding part provided in the portion below the spring of a front fork; and

at least a part of the second brake pipe between the front part holding part and the rear part holding part is formed by a flexible hose member.