SXR Need Sxr Ada head and domes help

I just purchased a 2006 Sxr 800 with a built motor but having tunning problems. I pulled te head off and Looked at the domes and it has the ka7526 domes which is the 26cc domes for the 750 Kawi motor. Could that be a problem that I need to get new domes? Also the problem I am trying to fix is that the back cylinder is way lean and the front is way rich. I even added an extra turn to the back cylinder carb and it's still lean. I pulled the carbs and checked them for jet size and to make sure they were clean and they were. Any help would be great!!
 
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