I assure you it's normal. Blow by is checked at the vent hose that is fed into the air filter housing. If it's excessive it will blow a lot of oil into the air filter. Some oil is normal. But a soaking amount is not. No need to take the oil cap off anymore to check it. It's a horizontal opposed engine, man. Both pistons move to the center at the same time, and move apart at the same time, so crankcase pressure spikes, them drops. It's normal.
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