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07 YZ450F Blowing oil out valve cover breather tube

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My YZ540F started blowing oil out the valve cover breather tube so I had the cylinder honed and put in a new piston and rings and valve seals thinking blow by. Now its blowing out even more. I had a puddle after 16 sec of running. Any ideas???  Thanks

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As long as the oil isn't over filled you still have blow by. No two ways about it.

Edited by drtrcr400

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Its def not over filled. Anyone ever heard of a cavtating oil pump doing this?

 

Not cavitating, no.

 

Check this: If the dip stick is loosened or removed, will oil come from the dip stick hole? 

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