| 摘要 |
A vehicle body frame (9) has a head pipe (2), a main frame (3), a down frame (7), and a lower frame (8). The main frame (3) extends backward and downward from the head pipe (2). The down frame (7) extends below the main frame (3) backward and downward from the head pipe (2). The lower frame (8) connects the forefront of the down frame (7) and the forefront of the main frame (3). An engine (15) has a crankshaft (44), a crankcase (40), and a cylinder member (63). In the crankcase (40) is received the crankshaft (44). The cylinder member (63) is attached to the crankcase (40). Inside the cylinder member (63) is formed a cylinder (41a).The center axis of the cylinder (41a) extends obliquely backward and upward. |
