| 摘要 |
PROBLEM TO BE SOLVED: To easily connect a vehicle body frame by a simple structure. SOLUTION: In the frame structure for the motorcycle, a main frame 111 is constituted by main tubes 62, 63 extending from a head pipe 12 for supporting a front wheel and a front fork to a rear, oblique and downward side; a down tube 64 approximately downwardly extending from the head pipe 61; lower tubes 116, 117 rearwardly extending from a lower end of the down tube 64; and central tubes 113, 114 for connecting each of rear ends of the lower tubes 116, 117 and rear ends of the main tubes 62, 63, and the main tubes 62, 63 and the central tubes 113, 114 are constituted by a pair of left and right pipes respectively. The main tubes 62, 63 and the central tubes 113, 114 are connected through a cross member 66 provided with openings 143, 144 fitted with rear ends of the main tubes 62, 63 and openings 146, 147 fitted with upper ends of the central tubes 113, 114. COPYRIGHT: (C)2008,JPO&INPIT
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