Patent ID: 8250939

Claim:
A transmission for a vehicle comprising: a gear shift mechanism formed by arranging gear trains of a plurality of selectively establishable shift positions (G 1 , G 2 , G 3 , G 4 , G 5 , G 6 ) between a shift input shaft and a shift output shaft; a shift drum rotatably supported on an engine case for selectively establishing one of the plurality of gear trains (G 1 to G 6 ) in response to a rotational position; a shift spindle rotatably mounted on the engine case so as to be rotatable in response to a shift manipulation; a shift drive force transmitting mechanism arranged between the shift spindle and the shift drum for rotatably driving the shift drum in response to the rotation of the shift spindle; a lost motion means disposed in the shift drive force transmitting mechanism for temporarily accumulating a shift drive force transmitted from the shift spindle; and a shift stopper mechanism for resiliently holding a rotary position of the shift drum in a state where one of the plurality of gear trains (G 1 to G 6 ) is established or in a neutral state; wherein the transmission further includes, separately from the shift stopper mechanism, a shift restricting mechanism for performing a changeover between a state for allowing a changeover operation of an established state of the plurality of gear trains (G 1 to G 6 ) due to an action of the shift drive force which is temporarily accumulated by the lost motion means and a state which interrupts the changeover operation.