| 摘要 |
PROBLEM TO BE SOLVED: To decrease the size of a steering head in a front wheel suspension system provided with a rocking type front arm. SOLUTION: An upper end of a front fork 2 supporting a front wheel 1 is rotatably supported by a joint A on an upper side holder portion 6a formed on a front end portion of a body frame 5 via a steering head 4. Meanwhile, the mid portion is rotatably connected to a front end portion of a front arm 18 by a joint B. The front arm 18 extends to the rear of a cylinder portion 14 along the sides of a down frame 7 and the cylinder portion 14, where it is rotatably connected to an upper portion of a crankcase 15. The front fork 2 is comprised of a pair of left and right bottom pipes 30, a bottom bridge 31 that connects these bottom pipes 30, and a stem pipe 32 which is one pipe extending upward from the center portion of the stem bridge 31. The upper portion side of the stem pipe 32 is slidably fitted into a guide pipe 33 of the steering head 4. A steering wheel holder 47 to which a steering wheel 3 is attached is provided on the front side surface of the guide pipe 33 of the steering head 4.
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