Sign in to follow this  
Followers 0
yamaha 422

03' YZ450F Oil leak below lower head bearing.

4 posts in this topic

I have a oil leak below the lower head bearing on the front of my bike. It is for sure motor oil. The oil is in the frame on that year. I can not see a crack. Is there one there. Can I just run another bead over the factory one and be done with it?

Share this post


Link to post
Share on other sites

Have a competent welder (you, if the description fits) weld over the crack. The frame is a light gauge high quality steel, and it needs to be correctly done.

Pressure testing the frame to locate the leak is a good plan.

Share this post


Link to post
Share on other sites

Mine was cracked right along the factory weld. It was pretty hard to find. Sounds like you have the same problem. You'll need to find it to repair it.

Share this post


Link to post
Share on other sites

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
Sign in to follow this  
Followers 0