Patent ID: 7631570

Claim:
A transmission, comprising: a first shifting part; a second shifting part, said first and second shifting parts for shifting power of an engine; a first shift clutch for transmitting and interrupting the power to the first shifting part; a second shift clutch for transmitting and interrupting the power to the second shifting part; and a selection mechanism that selects gear steps in the first shifting part and the second shifting part, the first shift clutch and the second shift clutch shifting gear steps of the first shifting part and gear steps of the second shifting part, respectively, wherein the selection mechanism includes a shift drum that is rotated based on a shifting operation and shifters that are guided and moved by guide portions disposed on the shift drum in accordance with rotation of the shift drum, the shifters being movable to selection positions where the gear steps are selected and to neutral positions where the gear steps are not selected in the first shifting part and the second shifting part, and the guide portions guide the shifters to the selection positions in the first shifting part and the second shifting part with respect to one of predetermined rotational positions of the shift drum.