Controller and control method for controlling behavior of motorcycle

A controller (60) for controlling behavior of a motorcycle (100), the controller comprising:

• a control amount setting section (65) that sets a control amount in automatic cruise operation;
• and
• an execution section (66) that makes the motorcycle (100) execute the automatic cruise operation corresponding to the control amount set in the control amount setting section (65), and further comprising:
• a mode change section (64) that changes a mode to a first mode (A) in a state where a temperature of a rear-wheel friction brake mechanism as a friction brake mechanism (29) for a rear wheel (4) of the motorcycle (100) is lower than a first prescribed temperature or to a second mode (B) in a state where the temperature of the rear-wheel friction brake mechanism is higher than the first prescribed temperature during automatic deceleration in the automatic cruise operation, wherein
• the control amount setting section (65) changes the control amount in accordance with the mode change in the mode change section (64), and
• in the case where a braking force generated on the rear wheel (4) in the first mode (A) and the braking force generated on the rear wheel (4) in the second mode (B) are compared under a condition that the same deceleration is generated in the motorcycle (100) by the automatic deceleration, in a state where the deceleration is at least less than a first reference amount, the braking force generated on the rear wheel (4) in the second mode (B) is smaller than the braking force generated on the rear wheel (4) in the first mode (A).