Idle erratic and lean on one side rich on the othe

Hello, I have a '79 Kawasaki KZ400 LTD. 2-1 Kerker exhaust. Everything is stock on this bike.

Here are the symptoms:

The bike was in storage and properly stored for about 2 years.
Runs best with choke on (not fully). Left cylinder is running lean right cylinder is rich.
Bike can idle around 600rpm but after running for a while it heats the bike up and the idle is more erattic.
When RPMs are below 3000RPM in 1st the bike tends to lope along until I get to around 3500 rpm then it kicks
in and we take off.

My feeling is that the carbs are synced pretty closely but that I am picking up off the intermediate jet versus
the pilot jet on the right carb. I have gone back 3 times and cleaned the pilot jets, so I cleaned the petcock
now I plan on replacing the fuel lines and getting a jet kit.

My friend and I are both stuck on this. I believe I need to pull the carbs, tear them down and let'em soak.

Feedback is greatly appreciated, thanks in advance.


1. Carbs have been checked for vacuum leaks

2. Fuel petcock cleaned, tank inside is very clean

3. Fuel filter installed

4. Oil and filter has been changed

5. valve clearance checked and adjusted accordinly

6. Bike idles but as it heats up it starts to drop the idle, the idle screw tends to make "WIDE" adjustments

7 Bike can idle around 600rpm but after running for a while it heats the bike up and the idle is more iradic.

From High idle RPM to dead.

8. Brake service done

9. New clutch cable

10. Needles cleaned and increased slightly in size

11. adjusted idle screws on side of carbs (think thats the wrong terminology)