| 摘要 |
PROBLEM TO BE SOLVED: To efficiently convert an input load of an operating lever to a hydraulic pressure with a light operating force and obtain an excellent operating feeling from the operating lever at the time of hydraulic pressure generation in a hydraulic pressure master cylinder hydraulically operating the brake and clutch of a bar handle vehicle or at the characteristic points in the service region of the hydraulic pressure master cylinder. SOLUTION: A straight line L1 connecting the center O1 of a pivot 28 to the input point of a holdingly operating part 22b is set in parallel with the center axis L2 of an accelerator grip 24 when a build-up of hydraulic fluid is started in a hydraulic chamber 37 of a hydraulic pressure master cylinder 21 by holding and operating a brake lever 22.
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