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geezer#99 · 04-18-2014, 12:39 PM

It's likely a valve seal.
Clean the plug real good or use a new one, run it awhile (go for a cruise), pull the plug and look for oil on the plug threads.
The only place that oil will come from is a valve seal that's caput.

04-18-2014, 12:39 PM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,656	Re: piston question It's likely a valve seal. Clean the plug real good or use a new one, run it awhile (go for a cruise), pull the plug and look for oil on the plug threads. The only place that oil will come from is a valve seal that's caput.