| 摘要 |
PURPOSE:To enhance the durability of a carburetor against an external environment factor, and enable to keep warming thereof with exhaust heat by fitting a cover section to an air cleaner for concealing the carburetor and jointing the cover section to an air introduction duct. CONSTITUTION:The air from a scroll passage cools a cylinder head 26 and a cylinder block 27, thereby being raised in temperature. Then, a part of the heated air is discharged outside, and the remaining heated air is discharged from an exhaust opening 90 toward a carburetor 80 via an air introduction duct 92. As a result, the heat insulation of the carburetor 80 is maintained. In addition, an air cleaner 81 is fitted with a cover section 89 as integral part thereof for concealing the external side of the carburetor 80, and the duct 92 is jointed to the cover section 89. Thus, the duct 92 and the cover section 89 of the air cleaner 81 cooperate to act as a protector against an external environment factor such as rain drops, splashed water and the travel-generated wind. Consequently, the durability of the carburetor 80 against the external environment factor is improved. |
