[bhap]

Take a look at the hub that holds the turn signal lever. On mine the hub would rotate and the cancel cams would get off center and do what you are describing - stay on in one direction and only cancel if you pull lever all the way in other direction. I centered the hub and tightened the three screws that hold it in place. The other thing you can check is that the bowden cable is secured to the column so it doesn't flex when you turn the signals on and off. I put a couple of cable ties on mine and it has been working pretty good.