400ex pumping oil out crankcase breather! Please Help! (yes i did a search)

[leprogle85]

My 400ex is pumping oil out crankcase breather. It had old piston and rings and i was told blow by was causing pressure in bottom end. New piston ring and bore and gaskets later, it is still doing it. It now has a 13:1 JE 426 piston in it, and I don't know what to look for. I am currently doing the 5 min idle, and then checking oil to see if i had too much oil.

[leprogle85]

So i did the 5 min idle, then check, and oil overflowed right out of the dipstick hole, when I took it out. I hope this was my problem all along even though it sounds stupid. I am going to drain the oil and replace the filter and only put 2 liters in. I have been putting around 2.5 because that's what i was told to put in.
2.5liters canadian? 2 canadian liters any different from 2 quarts or 2 us liters?

[tri5ron]

1.85 quarts with filter change.
I just did mine an hour ago.

do you need me to look in the manual for you for a metric oil capacity?
would be happy to go get it and look it up for you.

[leprogle85]

I found a conversion on the net. 1 quart equals 946ml which is what is sold here.
Can you measure the length of your dipstick from the o ring to the full line?
I'm running a 185s dipstick i had to cut down to make fit but i believe the length to the full line is the same

[mcgrath]

Ok just so you know..
after draining 1.8 liters
after draining with filter change1.85 liters
after disassembly2.2 liters

This is what the honda manual says. And a liter is a liter no matter where you are 1000ml=1liter

not sure if you needed this info just thought Id help.