Abstract: A power transmission device includes a drive shaft, one end of which extends beyond a drive-side transmission case, a drive wheel mounted onto the one end of the drive shaft, a driven wheel journaled by a driven-side transmission case that is mounted onto the driven-side transmission case, and a cover member. The cover member is mounted on the driven-side transmission case and covers one end of the drive shaft, the drive wheel and the driven wheel from a location on an outer side of the transmission case. A regulating member is provided to regulate movement of the drive wheel in an axial direction relative to the driven-side transmission case. The regulating member and the cover member are each in separate abutment with corresponding abutment surfaces the driven-side transmission case. The abutment surfaces of the transmission case are substantially coplanar with each other.

Abstract: The present invention discloses an engine device for motorcycles in which a starter motor for transmitting drive force to a crankshaft through a reduction gear train can be disposed closer to the crankcase. The engine has a starter motor with a motor shaft, a crankshaft, and a reduction gear train for transmitting drive force of the starter motor to the crankshaft. The reduction gear train includes first gears supported for rotation on the first support shaft disposed parallel to the motor shaft of the starter motor, second gears supported on the second support shaft disposed parallel to the first support shaft, third gears supported on the generator shaft disposed parallel to the second support shaft, and a starter gear provided on the crankshaft disposed parallel to the generator shaft. The motor shaft of the starter motor is located closer to the generator shaft than the first support shaft.

Abstract: The present invention discloses an engine device for motorcycles in which a starter motor for transmitting drive force to a crankshaft through a reduction gear train can be disposed closer to the crankcase. The engine has a starter motor with a motor shaft, a crankshaft, and a reduction gear train for transmitting drive force of the starter motor to the crankshaft. The reduction gear train includes first gears supported for rotation on the first support shaft disposed parallel to the motor shaft of the starter motor, second gears supported on the second support shaft disposed parallel to the first support shaft, third gears supported on the generator shaft disposed parallel to the second support shaft, and a starter gear provided on the crankshaft disposed parallel to the generator shaft. The motor shaft of the starter motor is located closer to the generator shaft than the first support shaft.

Abstract: A power transmission device includes a drive shaft, one end of which extends beyond a drive-side transmission case, a drive wheel mounted onto the one end of the drive shaft, a driven wheel journaled by a driven-side transmission case that is mounted onto the driven-side transmission case, and a cover member. The cover member is mounted on the driven-side transmission case and covers one end of the drive shaft, the drive wheel and the driven wheel from a location on an outer side of the transmission case. A regulating member is provided to regulate movement of the drive wheel in an axial direction relative to the driven-side transmission case. The regulating member and the cover member are each in separate abutment with corresponding abutment surfaces the driven-side transmission case. The abutment surfaces of the transmission case are substantially coplanar with each other.

Abstract: A cooling system and crankcase ventilating system for a V type internal combustion engine wherein the crankcase ventilating system includes a crankcase ventilating chamber that is positioned in the valley of the V of the engine. The cooling system includes a main coolant gallery that extends through the valley of the engine and is disposed between the crankcase ventilating chamber and the crankcase for cooling the crankcase ventilating gases. The main gallery also partially encircles the main oil gallery for cooling the lubricant.