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This article is from the Ducatis Motorcycles FAQ, by Duke Robillard duke@io.com with numerous contributions by others.

19. "Should I be worried about my crankcase breather seeping, specificallya light mist on the back side of the engine case, between the rightswingarm pivot and the clutch cover?"

Thanks to Julian Bond for some of this

Unless it's a lot of oil, no. If it IS a lot of oil, the concern isn't that
the breather is having a problem, rather that there's excessive blow-by,
say, from a damaged ring or similar oil-retaining device. Most Ducs tend to
mist from the breather a bit because it's a small crankcase volume for the
displacement -- translate: high crankcase pumping action. California bikes
get a more proactive crankcase ventilation system so they tend to stay a
little drier.

Also, the seal between the breather assembly and the crankcase is not very
good as the breather is plastic and deforms easily. One thing to try is to
Unscrew it and carefully clean everything and then use instant gasket on
the breather and washer.

 

Continue to:

• prev: 18. "Should I worry about that white scum that seems to appear inside theoil sight glass?"
• Index
• next: 20. "Do most of you guys have the European kickstand that automaticallyflicks up when the bike is straightened up?"

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