Ok so on my 93 spx 650cc, I had the oil injection fail and it cooked the top end. replaced the top end and put in the oil block-off so now I premix. Now I understand you are supposed to Leave the oil tank in with the 2 hoses going to the crankcase. But everytime I fill the oil tank up, it floods the engine with oil and/or the engine runs really oil rich until all the oil is gone. Now I think I know the horrifying answer but Im not sure. Do I need to replace the crankshaft? or some seals? Im not sure whats wrong.