Today, we did some more tests.
As i mentioned before, the oil comes out rather fast when in high revs.
So we had it running till the oil started coming again, then loosened the oil cap and there was a noticeable difference.
It seems there is a pressure buildup in the oil sump (upper one) which prevents the breather to allow oil to first pass up to this sump. so instead, it seeks the "easier" way out - via the vent to the airbox.
Does my explanation make sense?
Is there some kind of one-way valve to prevent a pressure build up in the sump which could be faulty?
thanks for all help so far....
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