air puffing out of vent line

I noticed my new WR puffs quite a bit of air out of the large vent line near the shifter pedal. A drop or two of oil is always present too. Is this normal or something I should be worried about? Where is this air coming from?

This is the crancase breaker.

Everytime the piston comes it will try to displace 400cc of fumes/vapour etc from inside the crankcase.

There will also be some blowby that ends up in the crankcase..

Its completly normal!

You'll also only lose 1-2 drops of oil..



**Ride it like you Stole it!**

Matt Porritt

99 YZ400F

Rubber Chicken Racing

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