| 摘要 |
In a motorcycle where a housing cavity of the engine for housing part of the starter motor, and a seat with a sensor mounting for installing a speed sensor for vehicles located at the front portion of an outer periphery of a specific gear of the gear transmission mechanism are located in the upper surface of the crankcase just behind the cylinder block, a toothed wheel cover being adjusted to a lateral surface of the crankcase, the speed sensor for vehicle that is located at the upper surface of the crankcase being protected while the specific protecting cover is removed in order to reduce the number of components. A cavity for the installation of a sensor 55 with an inner portion in which a mounting seat with sensor 47 is formed and which has an aperture formed in the lateral surface of the crankcase 19 has been included in the upper portion of the crankcase 19 just behind the cavity for housing the motor 45. The speed sensor for vehicle 46 is installed in a fluid manner in the mounting seat with the sensor 47, in such a manner that this has been surrounded by the starter motor 44, the toothed wheel cover 43 and a lateral wall of the cavity for the sensor installation, Selected drawing Fig. 2. |
