When I removed the rubber tube from the spigot I noticed that the oil was dripping out instead of flowing.
The inner bore of the spigot is 3/16 ". Is that width enough for the oil feed.?
I use SAE 50.

John

email (option): john.kater@chello.nl

John if you remove the hose from the oil feed on the oil tank, it should flow out quite freely. Are you sure you are not referring to the return pipe?

Ron

email (option): ronpier@talk21.com

Yes Ron , I am sure. But I found out that 3/16" is the right measurement, because the adaptors in the crankcase have the same.

John

email (option): john.kater@chello.nl

Check your oil tank breather arrangement. I'm not an expert on M20s but there must be some sort of breather or vent in the oil tank. A blockage would mean the oil will come out in gloops as the air tries to get in the tank!

Hi john,

I would also check if there is no sludge which is blocking the drain tube.
You can try and push a metal wire from the drain pipe towards the oil tank,
And see if the flow increases.

If yes, then the oil tank would have to be cleaned, on or off (better) the bike.

email (option): noam10@gmail.com