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General Category => General Discussion => Topic started by: guzziownr on February 23, 2017, 10:39:45 AM

Title: Bosch plug chipped nose
Post by: guzziownr on February 23, 2017, 10:39:45 AM

The Eldo was reluctant to start so I had a look at the plugs.  It did start and run...
(http://thumb.ibb.co/g4Jz6F/IMG_1287.jpg) (http://ibb.co/g4Jz6F)

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Title: Re: Bosch plug chipped nose
Post by: pehayes on February 23, 2017, 11:39:25 AM

A-install new plugs.  Same Bosch.
B-where did that piece of porcelain go?
Hmmmm?

Patrick Hayes
Fremont CA

Title: Re: Bosch plug chipped nose
Post by: pat80flh on February 23, 2017, 05:12:06 PM

Hard to tell, but it looks like some oil is being burned in that cylinder.

Title: Re: Bosch plug chipped nose
Post by: Chuck in Indiana on February 23, 2017, 05:59:00 PM

Quote from: pat80flh on February 23, 2017, 05:12:06 PM

Hard to tell, but it looks like some oil is being burned in that cylinder.

Possibly, but weak ignition can look like that.

Title: Re: Bosch plug chipped nose
Post by: Rough Edge racing on February 23, 2017, 06:07:19 PM

 A plug like that can be caused by detonation .....Oil contaminates the fuel air mixture increasing the possibility of detonation.Sometime s detonation is so severe pieces of piston break off..Is that an older bike with chrome plated cylinders?.....Or it's just a defective plug... The piece could have been blown out the exhaust... If a bore scope is handy you may want to have a look inside the cylinder...

Title: Re: Bosch plug chipped nose
Post by: guzziownr on February 23, 2017, 09:34:47 PM

Quote from: pehayes on February 23, 2017, 11:39:25 AM

A-install new plugs.  Same Bosch.
B-where did that piece of porcelain go?
Hmmmm?

Patrick Hayes
Fremont CA

New plugs and went for a ride.    No plans to take the bike apart this season.  The old warhorse will just have to soldier on.