I just bought a 1979 kawasaki 650 and the carbs on the left are leaking gas out of the overflow hoses connected to them. How do I fix this? Also my hazards don't work and my blinkers blink erratically. Please help me get my first bike road ready...

Your carbs on the left side have a sticky needle,start the bike and tap the 2 left carbs on the bottom of the carb with the rubber end of screw driver and spray with carb cleaner.
This will tell you if its sticky needles.