I have an 86 Valcun 750. All the light come on when the bike is running, even the turn signals light up. The problem is the other day while riding, the left front turn signal is lit up but does not blink. The left rear signal blinks fast, I checked the bulb and it looks fine..

 

Check the blinker unit. It's the part that makes the 'tic....tic....tic' noise.