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 Won't run.

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little750
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PostSubject: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 8:18 am

My 1200 8v won't run on left pot,new plugs and have spark cleaned injection getting fuel, still won't run on 2 pots. Right cylinder is running fine. Help please 🙏.
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little750
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 8:28 am

Plug cap shorting to head maybe.

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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 8:57 am

Hi I have ngk plug caps fitted. So hopefully not, I'll replace them and see what happens.
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JohnA
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 8:59 am

Do a search on Spark Plug Cap and you’ll find plenty of info there. It’s a pretty often occurrence.

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little750
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 9:18 am

Bad new plug try an old one.

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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 10:15 am

Plugs fine plug caps fine injection fine. Iam at a loss, and pi---d off Crying or Very sad
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JohnA
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 10:38 am

There is a long thread called “dead cylinder” you might take a look at that.

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JohnA
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 10:39 am

Go to the search function….
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 10:54 am

Am new to this site can you tell me how to get the search function? Thanks.
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LBC Tenni
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 1:32 pm

[You must be registered and logged in to see this link.]

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JohnA
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 1:37 pm

Search button is on the top menu bar between FAQ and Members after you log in

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Pete Roper
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 5:15 pm

Was it running fine and then suddenly dropped a cylinder or did it just not fire on that cylinder when you first tried to start it?

It does sound like it a typical shorting plug cap but if they have been swapped out that has probable been covered.

A few other questions. Has it been rollerised? How many miles has it traveled? Were there any symptoms before it quit? Was it pulling cleanly to redline?
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 5:36 pm

Was running fine, parked up for 20 minutes then just stopped running on the left cylinder. I was just back from a week in the Highlands of Scotland ran perfectly, was rollerised end of 2020 in a guzzi dealer. Mileage is 17000mls,never been to the redline. Got me puzzled.
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Pete Roper
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 6:15 pm

It may of never been to redline but what happens at about 6,000rpm if you're trying to accelerate hard? Does it feel like you've suddenly run out of puff regardless of what gear you're in?

You're confident it has fuel and spark? On the side that has failed you can still see a spark if you hold the plug to the head and spin the motor?

If the answer to this is yes then the next step would be a compression test. Disconnect the injectors, throttle wide open and you should get about 175-180 psi.

I'm still not confident it's a mechanical issue, it sounds too sudden and the fact it started after the engine was stopped is still making me think spark as the likely culprit but let's rule out the nasties by the easiest means possible then you can go back to concentrating on the little things.

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GuzziSteve
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PostSubject: Re: Won't run.    Won't run.  Icon_minitime1Sat Mar 12, 2022 7:01 pm

Check wires are plugged in tight to coils, I seen them unplug but still intact in boot.
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