Will try the fuel tank. I and the instructor tried
[quote]ORIGINAL: Technito20

It's still a possibility it can be too lean. Remember, turn the needle valve one click at a time. Also the engine can be lean on the low end. Try and richin up the low intake valve and see what happens. But make sure you only richin up a 1-3 clicks at a time, because that screw is very sensitive and can be hard to get adjusted properly.