Exhaust hot and cold on cl350

[fatmatt]

So I have got my 72 Honda cl350 to idle now for a few minutes before dying off. I noticed that the left exhaust coming out the pipe is way cooler than the exhaust coming out the right. When I pulled the plugs the left looks wet and black and the right looks dry and black.
Any ideas on what might be causing this? I have the air mixture screws set the same on the carbs.

Thanks for the help.

 

[cxman]

do you actually have spark on that cylinder?

 

[fatmatt]

Yes I checked both plugs grounded against the engine case, they seem to be sparking well.

 

[Sonreir]

Carb sync done?