It's winter in WI so what do you do? Blow snow and tear down your HS40 to investigate. Last summer with the help of OldMiniBikes members, you guided me thru and helped me to get my Rupp Roadster ticking again after 45 years, ie. HS40 RUPP post. The engine started and ran but had a few issues, so I thought I would open it up. First issue, valve clearance, intake .020. In the original build the end of the valve was TIG welded and ground down to get my .008, apparently it didn't hold up. I replaced it with a new /old valve and now have the correct clearance. My real concern is the dipper and the governor shaft have been mating in the crankcase. (see pic). WHAT the heck did I do wrong? In my original post, HS40 RUPP, I did have oil leaking from the governor shaft, the comments /concern were to check that I had the correct amount of oil and the crankcase breather was working correctly, that was verified. When ever I ran the engine I would get a little oil leaking from the governor shaft. Any of the above mentioned be a cause the oil escaping thru the G. shaft? Hope this makes sense.