| 摘要 |
PROBLEM TO BE SOLVED: To provide a motorcycle body frame capable of ensuring the versatility of the shape while ensuring the strength and the rigidity when employing an aluminum motorcycle body frame, and avoiding degradation of the appearance around a head pipe. SOLUTION: A pair of right and left tank rail bodies (longitudinal members) 116 extending in the longitudinal direction of a motorcycle and a tank rail 44 with front ends and rear ends of the tank rail bodies 116 connected to each other respectively by front and rear cross members 117 and 118 are formed of aluminum casting, and the front cross member 117 and the rear cross member 118 are welded to a head pipe unit 100 and a seat rail 45, respectively.
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