The present invention relates to a straddle-type vehicle having hybrid drive system, in particular hybrid motorcycle, with internal combustion engine for generating power to drive the vehicle, an electric motor connected to a crankshaft of the engine and generating auxiliary power, with an automatic centrifugal clutch interposed in a power transmission system between the engine and a driving wheel, and with an acceleration data acquisition means configured to acquire an accelerator operation amount, wherein a motor control means is configured to supply the motor at a timing and with a magnitude of electricity in accordance with the detected accelerator operation amount such that the auxiliary power from the motor is applied to the automatic centrifugal clutch only with the clutch completely engaged.