| 摘要 |
<p>A vehicle body frame (1) of a motorcycle comprises a front frame portion (3) extending rearward from a head pipe (2), and a rear frame portion (5) extending downward or rearward from a rear end of the front frame portion (3). The front frame portion (3) includes at least a pair of right and left frame members (30,31). A front end of the rear frame portion (5) is welded to a center cross member (4) coupling rear ends of the frame members (30,31). The center cross member (4) has a closed cross-section structure in which plate members (41,42) are joined together in a forward and rearward direction.</p> |
