After a lot of checking I thought of cleaning the air filter. That was really necessary, and might have solved the problem. We'll see.

I'm an ass ...

Auke

I'm only an expert on quoting other peoples recommendations, so don't kill me on this one.

It seems that the air-outlet of the engine / crankcase can exhaust too much oil, which is then taken back into the engine through the airfilter-box. Try taking the tubing off the air-filter box and placing the end in a can or bag. This could resolve this problem.

Good luck!

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Planning to travel from the Netherlands to Maroc / Mauritania / Senegal around april 2002.