To provide a speed change control device improving workability, responsiveness, a sense of driving, etc., on a motorcycle.
The speed change control device for a motorcycle furnished with multistage shift mechanisms 20, 21, 79 made of a plural number of stages of speed change gears 17, 19, a clutch 14 for shifting to intermit transmission of rotation at the time of a speed change gear change of the shift mechanism and an ECU to drive and control the shift mechanisms and the clutch in accordance with a previously set sequence according to an input command of a shift position is furnished with a rotation control means 11 to increase or decrease engine speed in accordance with a shift direction at the time of shift changing and is devised to select and change either of an automatic mode to find the shift position by computing and processing it from a detection data in a driving state and a manual mode to manually input it by operating a shift switch 3 as a shift position input method to the ECU.
YOSHINO TORU
SUGITA MASAO
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