I've got this 1970 SL 175 running pretty good now but don't get to ride much now due to winter. The last two times I rode it I had an oil leak where the cases come together. It's not a severe leak but enough to run down the engine and drip on the exhaust pipes right where they come together. While I'm riding it's not much of a problem but when I stop it makes allot of smoke. Does anyone know how to seal this without doing a complete rebuild? I would like to have it rebuilt at some point, just not right now. Also I don't think I have a problem but can someone tell the signs of the engine running a little hotter than normal.