07 YZ450F Blowing oil out valve cover breather tube

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

Oil overfilled?

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

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

Edited by drtrcr400

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? 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now