STEPPED AUTOMATIC TRANSMISSION FOR STRADDLE RIDING TYPE VEHICLE, POWER UNIT WITH THE STEPPED AUTOMATIC TRANSMISSION, AND STRADDLE RIDING TYPE VEHICLE WITH THE POWER UNIT

摘要

[Problem] To provide a stepped automatic transmission being high in energy transmission efficiency.;[Means for Resolution] A rotating shaft 54 is formed with a first rotating shaft side oil path 145a and a second rotating shaft side oil path 146a. The first rotating shaft side oil path 145a extends leftward from a right end of the rotating shaft 54. The first rotating shaft side oil path 145a is connected to a working chamber 133 of a first hydraulic clutch 66. A second rotating shaft side oil path 146a extends rightward from a left end of the rotating shaft 54. The second rotating shaft side oil path 146a is connected to a working chamber 137 of a second hydraulic clutch 70.