Patent ID: 7523737

Claim:
A drive mode switching device for a motorcycle including a throttle, a main throttle valve controlled to be opened or closed by an operation of the throttle and a sub throttle valve controlled to be opened or closed in response to an opening degree of the main throttle valve, the drive mode switching device comprising: a memory storing a plurality of sub-throttle valve opening degree maps, each of which has unique sub throttle valve opening degree characteristics, fuel injection amount maps each of which has unique fuel injection amount characteristics and corresponds to each of the sub throttle valve opening degree maps respectively, and ignition timing maps, each of which has unique ignition timing characteristics and corresponds to each of the sub throttle valve opening degree maps respectively; a drive mode selecting switch operable to select an intended drive mode from a plurality of drive modes so as to select a sub throttle valve opening degree map from the stored sub throttle valve opening degree maps; and an engine control unit operable to control an engine based on the selected sub throttle valve opening degree map, one of the stored fuel injection amount maps and one of the stored ignition timing maps which correspond to the selected sub throttle valve opening degree map.