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Author Topic: Bosch plug chipped nose  (Read 1525 times)

Offline guzziownr

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Bosch plug chipped nose
« 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...


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Online pehayes

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Re: Bosch plug chipped nose
« Reply #1 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
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Offline pat80flh

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Re: Bosch plug chipped nose
« Reply #2 on: February 23, 2017, 05:12:06 PM »
Hard to tell, but it looks like some oil is being burned in that cylinder.
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Offline Chuck in Indiana

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Re: Bosch plug chipped nose
« Reply #3 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.
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Re: Bosch plug chipped nose
« Reply #4 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...
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Offline guzziownr

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Re: Bosch plug chipped nose
« Reply #5 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.
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