660Z : crank case pressure > clutch lever seal popped
 

Has anybody else suffered the clutch lever seal popping (with a resulting fine oil leak / spray)?

I understand single cylinder engines can build up some pressure, especially with sustained motorway riding. I was not going in excess of 5000/5500 RPM at the time.

I checked the breather pipe for blockages, but could not find any.

Anybody else encountered this? Any workaround?

Thank you ...

Normal SEAL image : http://78.media.tumblr.com/76454b8f4...69po1_1280.jpg

Blown SEAL image : http://78.media.tumblr.com/1dfa4f508...69po2_1280.jpg