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You should also take the exhaust cover off and replace the gaskets. I had a motor over heat so I shaved the head flat again(definitely get this checked for warping cuz it sucks if you put it all back together and it still leaks) and replaced the gasket. After this i still had water getting in so i took the exhaust cover off and replaced the gaskets runs perfect now. I would take the exhaust cover off anyways and replace the gaskets cuz when you get water in the cylinders it blows out of the exhaust and cakes it with milky crappy greasy stuff and can cause issues because the motor can actually suck this back into the cylinder making you think you have a problem when it just needs to be cleaned.