There's an oil passage in the crankcase that is covered by the bottom of the shifter cover (see photo). I never seem to get the plug that goes in there in the oil seal kits I buy, and I've been getting by re-using the same one for a while now -- three or four dis-assemblies. But this time I can't find the old one. I bought a seal that I thought was the right one, but it's too large to go in the oil passage. However, I noticed the gasket has a tab that completely covers the oil passage. Does anyone know if the gasket can hold the pressure on its own, or does the plug need to be there. Supplementary question: If I need the plug, where can I get one?
