Originally Posted by
d_adams
Assuming the case isn't cracked, yes, a new gasket should fix it. Unfortunately, to get to that gasket, you're in for a bit of a job. Personally, I'd pull the frame to do it since it only takes about 30 more minutes to remove it completely vs rotating it. The rear header needs to be pulled off, so that's why I suggest pulling the frame. It's just easier to work on with everything off and out of the way. Might as well do a valve check while you have it off, change the spark plugs, etc.
Your options are replace just the gasket, or do everything right and swap out the water pump seals, valve check and everything else while it's apart.