Patent ID: 7101311

Claim:
A control system for a continuously variable transmission of a motorcycle including an engine having a crankshaft for driving the continuously variable transmission for rotation, a driving wheel, and a centrifugal clutch disposed between the continuously variable transmission and the driving wheel for connecting and disconnecting between the engine and the driving wheel, the control system controlling a transmission ratio of the continuously variable transmission based on a transmission control map, the control system comprising: a storage device that stores an idle-up use transmission map and a warmed-up use transmission map as the transmission control map; and a control device that carries out transmission control of the continuously variable transmission based on the idle-up use transmission map at start of the engine, and switches the transmission control map for use in the transmission control to the warmed-up use transmission map when at least one of a first condition that a predetermined time period preset based on a temperature of the engine has elapsed after the start of the engine and a second condition that rotational speed of the engine is lower than a predetermined idling engine speed is satisfied, wherein the idle-up use transmission map and the warmed-up use transmission map are set such that the transmission ratio of the continuously variable transmission is set to a value based on idling speed of the engine at which the centrifugal clutch is to be engaged or disengaged.