XR400 Burning Oil

Joined
Jul 12, 2001
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#1
My '96 XR400 is burning oil (approximately 8 oz after 20 hours of riding).

I imagine that this is not normal.

A couple of observations:
The spark plug has an burnt oily residue.
Just changed the oil and went to Honda 20W50 (mostly riding in hot south).

I have the Honda Service manual but it really just tells how to tear it appart and put it back together.

Some troubleshooting would help me here: valves? rings? etc.

What should I do next?

Thanks in Advance:cool:
 
Joined
Jun 16, 1999
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#2
First off, try a compression test. Most likely, you've just got a worn out top end. Yes, it is possible that oil can get into the combustion chamber by getting past the valve stems, but I would start by checking the condition of your piston rings.