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 Spark Plug Evidence

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Oz1200Guzzi
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PostSubject: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Sun Feb 25, 2018 4:20 pm

Been giving "Black Betty" here 110 000 km service over the last week. Apart from having no oil to use in the gearbox and CARC (note to self, don't put empty containers back into stock), i had everything I needed. Reused the rocket cover gasket for the 6th(?) time, which is awesome (use the thicker ones from the 1100 series, and not the 1200 ones which are thin, prone to split and piss on your foot while riding).

Put in some of Penrite's finest 10W60 into the bodily fluids reservoir, after doing some other bits and pieces that needed doing (dropped screw in the V; neutral light switch; side stand switch, rocker adjustments) and all looks good. Started most excellently and settled into a solid idle at 1150 rpm.

In the process, I removed 3 spark plugs (inner R/H side had been cross threaded once before and this will need some attention at some point in the near future - possibly with a top end refresh); I replaced the three I removed. here's a picture of what they looked like:

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Opinions as to their running condition? L/H on the bottom, R/H on top.

Don't worry about the rusty body, this always happens to the inner plugs.
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beetle
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Sun Feb 25, 2018 5:06 pm

End-on pics please! Need to see air-fuel ring.

Thusly:

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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Sun Feb 25, 2018 5:58 pm

Later Mark.
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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 2:45 pm

Updated photos:

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R/H on the left; L/H on the right
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beetle
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 3:10 pm

Weird. Electrodes look lean. Hard to tell from the pic. Are they white, or light grey? There's no air-fuel ring, only carbon, suggesting too rich. How much kilometrege?



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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 3:44 pm

I have been thinking too rich, too, hence the questions. I think they are white rather than grey. I now have 110,000 km on the old girl.

My exhaust shows evidence of too rich, judging by the black deposits. However the last 2,000 km have returned (from the dash) 4.5 l/100 km, so consumption is pretty good and no horses have been spared in achieving this.

Damned if I know...
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Pete Roper
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 3:59 pm

Soot could be oil burning. The high mileage Sport 12 we went through had rooted rings and buggered guides. Might be time for a top end freshen up.

Pete
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beetle
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 4:02 pm

Aye, Pete. I actually think it's running lean. This electrodes don't look happy.



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Pete Roper
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 4:15 pm

Tony, if you decide to hop into it I can order parts and probably have them here sooner and cheaper than waiting for the clowns at Peter Stevens to get them in.

My guess is that the rings will need replacing and the guides will need K-Lining. The valves themselves will probably go round again. A new cam chain probably wouldn't go amiss.

Pete
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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 5:55 pm

Sounds expensive Pete. Need the inner R/H plug thread recreated as well. Got a ballpark number? I might have to start saving... Like yourself, cash flow is woeful at the moment
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Pete Roper
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 6:20 pm

Lemme do a bit of pricing up. You might be surprised.
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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 7:01 pm

Always happy to be surprised, Pete. Especially pleasantly!
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Pete Roper
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 7:03 pm

I'm assuming that you'd be doing the work? Or at least most of it?
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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 7:35 pm

Happy to, it's what I do normally...
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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Mon Feb 26, 2018 7:39 pm

Come to think of it, I bought some bits from the old importers and I think I managed to get one base gasket (only one available). Would need head gaskets, another base gasket, rings and valve guide bits, I have a load of rocker cover gaskets which will last me many years, as the ones in it are for the 1100 and can be reused many times (don't know if I am up to 5 or 6 times - the 1200 ones are particularly shyte).

I should check and see what I have in stock first...
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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Thu Mar 01, 2018 12:45 pm

After adjusting the map for some increased richness, I must say I am happy with the results. I will do a plug pull either today or tomorrow to compare evidences.

The nasty bits of the map are no longer there, and she still "valve bounces" at red line. All good in the 'hood.
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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Sat Mar 03, 2018 3:25 pm

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Left on the left; Right on the right. Just over 300 km since looking pristine.

Comments?
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beetle
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Sat Mar 03, 2018 3:31 pm

Better. A bee's dick more fuel I reckon.



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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Sat Mar 03, 2018 3:44 pm

I'll go get a bee's dick from the back yard - surely there's one hanging around....

Stay tuned.

(1%, 2%, 3%, 4%, More?)
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beetle
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Sat Mar 03, 2018 3:48 pm

Baby steps from here. 1%.



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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Sun Mar 04, 2018 1:28 pm

I am now officially a 1%er - well my bike will be when I install the updated map. Forecast is for wet, wet, wet this week, though Wednesday looks to be a chance. Evidence will ensue...

Thanks for your guidance Mark.
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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Tue Mar 06, 2018 1:03 pm

Wow, chalk and cheese, I say. Magnificent!

Nary a pop, good all round. Me happy. Mark, I'll forward you the offending map shortly. Meanwhile, I'll take some piccies of the electron discharge devices after another 200 or more km.
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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Tue Mar 13, 2018 2:34 pm

And now...
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Thoughts Mark, other gurus...
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beetle
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Tue Mar 13, 2018 2:57 pm

Ends are in shadow. Can you retake in more light, please?






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Oz1200Guzzi
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PostSubject: Re: Spark Plug Evidence   Spark Plug Evidence Icon_minitime1Tue Mar 13, 2018 3:15 pm

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More betterer? This is with around 250 km
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