| 摘要 |
PROBLEM TO BE SOLVED: To prevent increase of an engine load for a motor cycle or the like, to require no remarkable design change for basic part items, part shapes and the like, and to provide a long life for a belt and the like. SOLUTION: An introducing cover 16 is provided in a side part of an engine 2 for a scooter or the like, and cooling air after used for cooling of the engine 2 is introduced into a belt chamber B inside a belt cover 12 through an introducing passage D inside the cover 16 to cool a drive pulley 4, a V-belt 7, a driven pulley 6 and the like in a belt transmission gear 1. A trap 17 and an air cleaner 18 are provided in a midway of the introducing passage D to remove a foreign matter such as soil and dust, and rain water and the like are discharged from a drain hole 19. |
