99 yz 400

i just got a 99 yz 400 it was leakin oil so bad i couldant ride it more than 5 miles. I fixed that problem now its blowin oil out the breather tube is there a way i can fix that

How much oil is in the bike ?

YZ400's always blow a little oil out the breather (usually a small patch on the ground after a ride).

If it is blowing a lot out of the breather it is either overfull with oil or you are pressurising the crankcase which is probably due to leakage past the piston rings.

i put 1.6 courts into it i got that out of the book. i rode the desert 100. when i was done there was some blow back on my frame & swing arm. & i had to put in about a 3rd of a court to top it off after my first 50 mile lap there is no motor noise or piston slap to indicate bad rings

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