HELP...Burning Lots of Oil YZ450

Here is the History..

-New piston/rings 40 hours ago..Checked valves and they were in spec.

-Last trip burned 600CC of oil in one 45 min ride

-Checked valves...very loose both exhaust and intake

-Oil black/metallic after oil change and a warm-up on the stand

Also, I seem to go trough timing chains every 50 hrs or so...I know its time to change because the cam jumps teeth and it wont start.

Any Ideas...

Thanks

Chris

BTW, its a 07 YZ450F

Sounds like the cylinder plating has failed.

As to the cam chain, it shouldn't be jumping teeth each 50 hours. Replace the tensioner and consider using a different oil or changing it more frequently. You may also want to check the cam caps for signs of seizure.

you could confirm it with a leakage tester if you have access to one, however can't think of anything else that would cause that kind of oil consumtion (something cylinder related that is).

Is it smoking? I would imagine so.

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