Abstract: A straddle-type four wheeled all terrain vehicle includes a bar-type handle provided forward of a straddle-type seat; a vehicle body cover covering a portion of a vehicle body including a steering shaft of the handle, the steering shaft penetrating through the vehicle body cover; and a belt converter, wherein an opening of the vehicle body cover through which the steering shaft pass is an intake port of a cooling air into the belt converter.

Abstract: A straddle-type four wheeled all terrain vehicle include a vehicle body with a seat which a rider straddles. A handle is placed forward of the seat for being steered by the rider straddling the seat to operate the vehicle body. A container is provided at a portion of the vehicle body that is situated between the handle and the seat, for accommodating a small article.

Abstract: An exhaust system for a two-cylinder V-engine, having front and rear cylinders and mounted on a saddle-type all-terrain vehicle, includes a muffler disposed behind the two-cylinder V-engine and provided with two connecting openings, a front-cylinder exhaust pipe having one end connected to the exhaust port of the front cylinder, and a rear-cylinder exhaust pipe having one end connected to the rear cylinder. The front-cylinder exhaust pipe is bent so as to extend rearward along side surfaces of the front and the rear cylinders to the muffler and is detachably connected to the connecting opening. The rear-cylinder exhaust pipe is fitted in the other connecting opening and is welded to the muffler.

Abstract: An engine cooling system for an all-terrain vehicle provided with a front fender (12), and an engine (3) provided with water jackets and mounted on a body frame (F) at a position between front and rear wheels includes a radiator (45) provided with a water inlet (54) and disposed in a front part of the body frame (F), a water filling cup (16) provided with a water filling opening (16a), and a thermostat case (17) holding a thermostat (17a) therein. The water filling cup (16) is separated from the radiator (45). The water filling cup (16) and the thermostat case (17) are placed in a part of a connecting pipe connecting the water inlet(54) of the radiator (45) and the outlets (57, 58) of the water jackets of the engine (3) at the highest level in a cooling water circulating passage. A protruded portion (18) is formed on the front fender (12) so as to surround a steering shaft, and the water filling cup (16) and the thermostat case (17) are placed inside the protruded portion (18).

Abstract: An engine brake control system for a vehicle provided with a variable-speed V-belt drive (15) including a drive pulley (6) and a gear transmission (13) disposed below the variable-speed V-belt drive (15) with respect to a power transmitting direction comprises a traveling speed sensor (110), a traveling mode discriminating sensor (111), an engine brake device capable of making engine brake effective by restricting the decrease of the effective diameter of the drive pulley while the vehicle is traveling at a traveling speed not lower than a predetermined traveling speed, and an engine brake control system which makes engine brake ineffective by removing restriction on the decrease of the effective diameter of the drive pulley (26) while the traveling mode discriminating sensor is providing a signal indicating that the vehicle is traveling in a reverse travel mode.

Abstract: A straddle-type four wheeled all terrain vehicle comprises: a bar-type handle provided forward of a straddle-type seat; a vehicle body cover covering a portion of a vehicle body including a steering shaft of the handle, the steering shaft penetrating through the vehicle body cover; and a belt converter, wherein an opening of the vehicle body cover through which the steering shaft pass is an intake port of a cooling air into the belt converter.

Abstract: An engine brake control system for a vehicle provided with a variable-speed V-belt drive (15) including a drive pulley (6) and a gear transmission (13) disposed below the variable-speed V-belt drive (15) with respect to a power transmitting direction comprises a traveling speed sensor (110), a traveling mode discriminating sensor (111), an engine brake device capable of making engine brake effective by restricting the decrease of the effective diameter of the drive pulley while the vehicle is traveling at a traveling speed not lower than a predetermined traveling speed, and an engine brake control system which makes engine brake ineffective by removing restriction on the decrease of the effective diameter of the drive pulley (26) while the traveling mode discriminating sensor is providing a signal indicating that the vehicle is traveling in a reverse travel mode.

Abstract: A straddle-type four wheeled all terrain vehicle include a vehicle body with a seat which a rider straddles. A handle is placed forward of the seat for being steered by the rider straddling the seat to operate the vehicle body. A container is provided at a portion of the vehicle body that is situated between the handle and the seat, for accommodating a small article.

Abstract: An engine cooling system for an all-terrain vehicle provided with a front fender (12), and an engine (3) provided with water jackets and mounted on a body frame (F) at a position between front and rear wheels includes a radiator (45) provided with a water inlet (54) and disposed in a front part of the body frame (F), a water filling cup (16) provided with a water filling opening (16a), and a thermostat case (17) holding a thermostat (17a) therein. The water filling cup (16) is separated from the radiator (45). The water filling cup (16) and the thermostat case (17) are placed in a part of a connecting pipe connecting the water inlet(54) of the radiator (45) and the outlets (57, 58) of the water jackets of the engine (3) at the highest level in a cooling water circulating passage. A protruded portion (18) is formed on the front fender (12) so as to surround a steering shaft, and the water filling cup (16) and the thermostat case (17) are placed inside the protruded portion (18).

Abstract: An exhaust system for a two-cylinder V-engine having a front cylinder (10) and a rear cylinder (11) and mounted on a saddle-type all-terrain vehicle includes a muffler (16) disposed behind the two-cylinder V-engine (3) and provided with two connecting openings (41, 42), a front-cylinder exhaust pipe (13) having one end connected to the exhaust port (12) of the front cylinder (10), and a rear-cylinder exhaust pipe (15) having one end connected to the rear cylinder (11). The front-cylinder exhaust pipe (13) is bent so as to extend rearward along side surfaces of the front and the rear cylinder (10, 11) to the muffler (16) and is detachably connected to the connecting opening (41). The rear-cylinder exhaust pipe (15) is fitted in the other connecting opening (42) and is welded to the muffler (16).

Abstract: A V-type two cylinder engine comprises: cylinders arranged forward and rearward such that they are inclined in V shape; a downdraft carburetor unit placed between the cylinders and including twin venturi bores provided for the respective cylinders and an air vent system making interior of carburetors communicate with atmosphere; intake manifolds each connecting a venturi bore of each of the carburetors to an intake port of a corresponding cylinder; and an air cleaner placed above the carburetors such that it covers the carburetors, and the carburetor unit is placed obliquely seen in a plan view according to positional difference between the cylinders in a direction of a crank shaft of the engine such that the venturi bore of each of the carburetors is closer to the intake port formed in a corresponding cylinder.

Abstract: A V-type two cylinder engine comprises: cylinders arranged forward and rearward such that they are inclined in V shape; a downdraft carburetor unit placed between the cylinders and including twin venturi bores provided for the respective cylinders and an air vent system making interior of carburetors communicate with atmosphere; intake manifolds each connecting a venturi bore of each of the carburetors to an intake port of a corresponding cylinder; and an air cleaner placed above the carburetors such that it covers the carburetors, and the carburetor unit is placed obliquely seen in a plan view according to positional difference between the cylinders in a direction of a crank shaft of the engine such that the venturi bore of each of the carburetors is closer to the intake port formed in a corresponding cylinder.