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Very odd oil leak

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Nurse Julie:

--- Quote from: SteveW on April 18, 2020, 03:52:38 PM ---
--- Quote from: sye on April 18, 2020, 03:41:52 PM ---Could it be a little oil draining from the airbox?

--- End quote ---

The breather pipe is not connected to the air box at the moment.

--- End quote ---
Is the Breather pipe fitted to the Breather cover on the top of the engine?. I think the outlet pipe is on the right side of the cover though, not the left, so still wouldn't explain how the oil got down the near side though and there shouldn't be any significant amount of oil up in the Breather cover anyway. Aren't leaks a pain 🙄🙄🙄🙄🙄

SteveW:
Breather pipe is connected at the top of the engine.

Woodside:
Is the breather pipe split

SteveW:
Breather pipe is fine.

This possibly sounds far fetched, but could oil get past the valve stem oil seals. Then down the valve and back all the way into the carb bowl. Then leaking out of the carb bowl seal?

The rest of the carb is clean, it’s just the bowl that has oil on it.

Nurse Julie:

--- Quote from: SteveW on April 18, 2020, 05:10:42 PM ---Breather pipe is fine.

This possibly sounds far fetched, but could oil get past the valve stem oil seals. Then down the valve and back all the way into the carb bowl. Then leaking out of the carb bowl seal?

The rest of the carb is clean, it’s just the bowl that has oil on it.

--- End quote ---
I don't think that could happen but if you pull the plug out of cylinder #1 the combustion chamber would have to be full of oil to confirm your theory.

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