Patent ID: 7823678
Filing Date: 2010-11-02
Classification: F02B,G01P

Abstract:
1. A motorcycle comprising: a power unit having an engine and a torque take-out shaft for outputting a torque generated by said engine as a drive torque; a torque transmission mechanism comprising a gear pair composed of bevel gears and a drive shaft, for transmitting said drive torque from said torque take-out shaft to a drive wheel; and a vehicle speed sensor operatively positioned relative to gear teeth for detecting rotation of one of a drive gear and a driven gear; wherein said vehicle speed sensor comprises a main body portion having a detecting portion opposed to an addendum of said one gear in a direction normal to a face cone surface of said one gear, said main body portion is mounted to extend in said normal direction for adjusting a gap between the vehicle speed sensor and the addendum for ensuring detection accuracy, wherein the driven gear includes a first shaft portion integrally provided therewith, and a second shaft portion press fitted into an axial hole of the first shaft portion, and further including a ring of first bearings adapted to directly support said first shaft portion of said driven gear for rotation, and a ring of second bearings adapted to directly support said second shaft portion for rotation, the ring of first bearings and the ring of second bearings being disposed on opposite sides of the driven gear, wherein the ring of first bearings and the ring of second bearings have diameters that are different from each other.