Abstract: A saddled vehicle includes: a vehicle body frame; an internal combustion engine supported at a lower portion of the vehicle body frame; a fuel tank supported at an upper portion of the vehicle body frame; and a canister. The canister is disposed around the fuel tank at a position lower than a seating portion of an occupant seat. A removable hermetic sealing cap or a one-way valve that prevents entry of rainwater from an outside is included in a drain pipe disposed at a lower portion of the canister. Accordingly, entry of rainwater into the canister is prevented with a simple structure.

Abstract: A saddled vehicle includes: a vehicle body frame; an internal combustion engine supported at a lower portion of the vehicle body frame; a fuel tank supported at an upper portion of the vehicle body frame; and a canister. The canister is disposed around the fuel tank at a position lower than a seating portion of an occupant seat. A removable hermetic sealing cap or a one-way valve that prevents entry of rainwater from an outside is included in a drain pipe disposed at a lower portion of the canister. Accordingly, entry of rainwater into the canister is prevented with a simple structure.

Abstract: To prevent the entry of ambient air and liquid such as rainwater into a direct acting type auto-by starter and thereby prevent the formation of rust in the auto-by starter, by adjusting pressure fluctuations in the auto-by starter caused by the operation of a starting valve for opening and closing a starting intake passage. A starting valve is lifted to open a starting intake passage to start an internal combustion engine. Pressure in a sliding space for the starting valve is increased, so that the gas in the sliding space flows out. The flow of the gas is absorbed by an increase in volume inside a bellows boot mounted on an upper portion of the starting valve. When the starting valve is lowered by the operation of a spring member, the pressure in the sliding space is reduced to allow the gas flow from the bellows boot into the sliding space.

Abstract: To prevent the entry of ambient air and liquid such as rainwater into a direct acting type auto-by starter and thereby prevent the formation of rust in the auto-by starter, by adjusting pressure fluctuations in the auto-by starter caused by the operation of a starting valve for opening and closing a starting intake passage. A starting valve is lifted to open a starting intake passage to start an internal combustion engine. Pressure in a sliding space for the starting valve is increased, so that the gas in the sliding space flows out. The flow of the gas is absorbed by an increase in volume inside a bellows boot mounted on an upper portion of the starting valve. When the starting valve is lowered by the operation of a spring member, the pressure in the sliding space is reduced to allow the gas flow from the bellows boot into the sliding space.

Abstract: To provide an overflow device for suppressing undue emission of fuel from an overflow pipe which can be produced with a simple structure at a low cost, and can be simply applied also to any existing carburetors. An overflow device for a float type carburetor includes an overflow pipe having an upper end opening exposed to a space in a float chamber defined above a constant fuel level in the float chamber, and a shield member arranged above the constant fuel level for forming a shielded space in the vicinity of the upper end opening. The shield member has a side wall vertically extending above and below the upper end opening, a top wall positioned above the upper end opening, and a bottom wall positioned below the upper end opening. The bottom wall is formed with fuel holes for allowing the fuel to flow into and out of the shielded space. The side wall is formed with small vent holes capable of suppressing the entry of the fuel into the shielded space.

Abstract: To provide an overflow device for suppressing undue emission of fuel from an overflow pipe which can be produced with a simple structure at a low cost, and can be simply applied also to any existing carburetors. An overflow device for a float type carburetor includes an overflow pipe having an upper end opening exposed to a space in a float chamber defined above a constant fuel level in the float chamber, and a shield member arranged above the constant fuel level for forming a shielded space in the vicinity of the upper end opening. The shield member has a side wall vertically extending above and below the upper end opening, a top wall positioned above the upper end opening, and a bottom wall positioned below the upper end opening. The bottom wall is formed with fuel holes for allowing the fuel to flow into and out of the shielded space. The side wall is formed with small vent holes capable of suppressing the entry of the fuel into the shielded space.