A motorcycle cruise control system intended for cooperation with a rotary throttle grip of a motorcycle, comprises a clamping device with a stationary clamping part and a movable clamping part which is movable between a clamping position for clamping the throttle grip and maintaining it in a desired rotary position, and a release position allowing a rotation of the throttle grip, an operating mechanism for moving the movable clamping part between its clamping and release positions and a holding arrangement for holding the clamping device substantially stationary with respect to the motorcycle. The operating mechanism comprises an eccentric mechanism with a first arm and a second arm of which respective first ends are pivotably connected to the stationary clamping part and movable clamping part, respectively, and of which the second ends are pivotably connected to each other.

A joystick controller comprises an operating rod (12) mounted for pivotal movement relative to a housing (14) so as to effect movement of a sensor element for providing an output signal indicative of a degree of pivotal movement of the operating rod (12). The joystick also includes at least one friction pad (20a, 20b) mounted to the operating rod (12) for providing a frictional resistance to movement of the operating rod (12) relative to the housing (14).

A rotary detent mechanism comprises a first wheel (26) having a plurality of radially extending lobes (28) circumferentially spaced about its axis of rotation. Second (34) and third wheels (60) each having outwardly extending ribs spaced for driving engagement with the lobes of the first wheel are positioned on opposite sides thereof. The ribs of the second and third wheels are related to the lobes of the first wheel such that driving rotation between the first wheel and the second and third wheels requires relative movement of the wheels toward and away from one another in a direction perpendicular to the axis of rotation of the first wheel. A drive member (20) is provided for selectively rotating one of the wheels and a spring assembly (80) is provided for biasing the wheels toward one another in a direction perpendicular to the first axis.

A rotary detent mechanism comprises a first wheel (26) having a plurality of radially extending lobes (28) circumferentially spaced about its axis of rotation. Second (34) and third wheels (60) each having outwardly extending ribs spaced for driving engagement with the lobes of the first wheel are positioned on opposite sides thereof. The ribs of the second and third wheels are related to the lobes of the first wheel such that driving rotation between the first wheel and the second and third wheels requires relative movement of the wheels toward and away from one another in a direction perpendicular to the axis of rotation of the first wheel. A drive member (20) is provided for selectively rotating one of the wheels and a spring assembly (80) is provided for biasing the wheels toward one another in a direction perpendicular to the first axis.

An electromagnetic brake device includes a motor (1), a control mechanism (2) and an operation unit (3). The control mechanism includes a fixed seat (32), an electromagnetic valve (33), a press button (331) and a rotation plate (34). The operation unit includes a mounting tube (24), a locking bar (25), a push button (21), and an elastic member (22). Thus, a user only needs to press the push button to lock or unlock the operation unit and the control mechanism to control operation of the electromagnetic valve so as to control the braking operation of the brake disc, so that the electromagnetic brake device is operated easily and quickly, thereby facilitating the user operating the electromagnetic brake device.