Motorcycle with lowered center of gravity
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsYousuke Ishida, Akifumi Oishi
Life of this patent
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Abstract
A motorcycle has a frame and a power unit. The frame comprises a main frame member extending rearward from a steering head pipe. The power unit comprises a drive source, power transmission devices attached to the output end of the drive source, and a casing that houses the power transmission devices and that is suspended from the main frame member. The casing of the power unit comprises a recess opening toward the main frame member. A boss is formed on the bottom of the recess and is suspended from the main frame member.
Claims11
A motorcycle comprising a steering head pipe, a main frame member extending rearward from the steering head pipe, a power unit comprising a drive source and a power transmission device attached to an output end of the drive source, the power transmission device being positioned within a casing, the power transmission device comprising a centrifugal clutch and a gear train that is located at an output end of the centrifugal clutch, the centrifugal clutch having a diameter greater than that of the gear train, the casing comprising a recess that opens toward the main frame member and the recess being formed at a position offset from the centrifugal clutch, a boss being formed on a base of the recess, the boss being suspended from the main frame member such that the power unit is suspended from the main frame member.
A motorcycle comprising a frame comprising a steering head pipe and a main frame member extending rearward from the steering head pipe, a power unit being suspended from the main frame member of the frame, the power unit comprising a drive source, the drive source comprising a casing, a continuously variable transmission being attached to the casing of the drive source and comprising a portion that extends upward to a location generally vertically higher than the casing, the continuously variable transmission comprising a primary sheave that can be driven by the drive source, a secondary sheave that is operatively connected to a power transmission device housed in the case, a belt connecting the primary sheave to the secondary sheave, the primary sheave, the secondary sheave and the belt being positioned within a CVT case, the CVT case comprising an upper portion that extends farther upward than the casing, the casing comprising a boss that is suspended from the main frame member, the boss being disposed on an upper portion of the casing and the boss being provided in such a position that it overlaps an upper portion of the continuously variable transmission when the power unit is viewed from a side and the upper portion of the CVT case being generally aligned with the boss in a longitudinal direction of the vehicle.
Dependencies are inferred from the claim text.