Blowing oil out of breather hose!!!!!!!! Help!!!

[Cody_300ex]

OK guys I have been riding today, pretty hardcore. I have a .335 web cam, weisco .040 11:1 piston, .020 taken off the head, P&P, 4 angle valve job, hmf pipe and WB header. I stop to switch riders and see there is oil on the side of the engine, then i see the breather hose is right there. This is the breather hose that is comes from the valve cover. What is wrong, will get pictures.

edit: I have checked all gaskets, all fine.

[Cody_300ex]

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[Cody_300ex]

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[Cody_300ex]

3 this is where is was located

[Cody_300ex]

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[2muchquad]

you could need rings..

[CBF2]

Put the oil separator box back on, that hose + the crankcase breather hose go into it and then another hose goes from the separator box to the airbox.

[brian-250]

cody, on the 400's oil comes into the breather when you over fill the oil. might be the same on the 300.

[Cody_300ex]

Originally posted by 2muchquad
you could need rings..

Just rebuilt, And it does not have any oil seperator box, It is a 96'. When I checked the oil it was over the oil line.

[rooster300ex]

Yea samething happend to me, but my piston pulled the sleeve down into the crank. Its either to much oil, or you overheated it. I think i heard your soundclip of your quad, sounded like you were hitting the rev limiter in every gear, maybe thats why. (not tryin to be a smart ***). When i change my oil now i put no more then 1 1/2 quarts of oil, then i warm it up and ride down the rode alil way, then i let it set for 20 minutes or so and then fill it up to the line. A 300ex takes about 1.69 quarts, And i change the oil filter everytime, so i always gotta add alil more when i'm done.