| 摘要 |
PROBLEM TO BE SOLVED: To improve a movement performance by concentrating a mass and lowering the center of gravity by disposing a power unit proximately to the vicinity of a front wheel.SOLUTION: A main frame 5 supporting a power unit 7 is formed from: an upper part 11 extending backwards from a head pipe 10; a down part 12 extending obliquely downwards from the head pipe 10; a lower part 13 extending backwards at a lower side of the power unit 7; and a center part 14 connecting rear ends of the upper part 11 and the lower part 13 and supporting a seat 4 in the upper portion thereof. Between the down part 12 and the lower part 13, a curved connection part 50 is provided. To a mount stay 51, a front mount flange 40 protruding forwards from a bottom of a crankcase 35 in a lower portion of the power unit 7 is attached through a spacer 52. The crankcase 35 is disposed at an upper side by forming a space 56 with respect to the lower part 13, and the mount flange 40 is not interfered with the down part 12 and is overlapped with the curved connection part 50 in a planar view, such that the power unit 7 can be disposed forwards as further as possible. |
