There is a mid position for changing lanes, that will self cancel. If you move the lever far enough, it should stay there until someone yells at you for leaving your blinker on. These bikes also had a buzzer for the full on position. But, many people would rather leave the blinker on for hours and curse other drivers for pulling out in front of them, rather than have the buzzer remind them their blinker is on.
Cheers,