MP3 400 cc 2007 ignition problem.
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Gasher82nd
Mon, 06 Feb 2023 18:10:38 +0000
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Piaggio MP3 400 2007
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Gasher82nd
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Piaggio MP3 400 2007
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Mon, 06 Feb 2023 18:10:38 +0000 quote
Hi ppl. My scoot has developed an ignition running problem. Trouble starting, changed plug twice, it will start with some persistance and will not tick over. it will accelerate but loose revs and it back fires and stops. Plug is dry black sooty when i check it, i have purchased 2 new plugs and still the same with each one. fuel seems to be getting there as i can smell it if twist accelerator grip when trying to start. Have no warning lights or anything to sugest there is a problem. Anyone had same issue who can shed a light on this please. cheers
old as dirt
Mon, 06 Feb 2023 20:37:09 +0000
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old as dirt
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Mon, 06 Feb 2023 20:37:09 +0000 quote
weak battery,
Madison Sully
Wed, 08 Feb 2023 01:32:28 +0000
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Madison Sully
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Wed, 08 Feb 2023 01:32:28 +0000 quote
old as dirt wrote:
weak battery,
Yup.
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Gasher82nd
Fri, 10 Feb 2023 16:56:39 +0000
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Piaggio MP3 400 2007
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Gasher82nd
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Piaggio MP3 400 2007
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Fri, 10 Feb 2023 16:56:39 +0000 quote
New battery fitted, someone suggested a sensor on fuel. Anyone had this go with same problems
jimc
Fri, 10 Feb 2023 18:04:35 +0000
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The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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jimc
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Fri, 10 Feb 2023 18:04:35 +0000 quote
Does it sound a bit 'rough' when trying to start? If so, a failing sprag clutch is a likely culprit. This is the 'freewheel' clutch between starter and engine. Eventually they disintegrate enough that the engine will seem seized. Replacement is a bit of a chore.
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Gasher82nd
Fri, 10 Feb 2023 19:03:31 +0000
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Piaggio MP3 400 2007
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Gasher82nd
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Piaggio MP3 400 2007
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Fri, 10 Feb 2023 19:03:31 +0000 quote
It all started when I was riding back in rain, thought water had got somewhere it shouldn't. Left it to try under cover for 2 weeks, it try to start but just turns over when I try to put small revs it then starts but if loose revs it dies and backfires. If when it goes I hold revs open a bit it will run but feels sluggish. Again after getting engine warm I loose revs it will die backfiring. I gave it full service changing belt, put mallossi variator on, with the new clutch spring, everything and still does same
old as dirt
Sat, 11 Feb 2023 00:03:55 +0000
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old as dirt
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Neutrino MP3 492.7 AK, 2013 Moto Guzzi Norge
Joined: Sun, 30 Mar 2008 04:38:24 +0000
Posts: 22148
Location: Harriman, Tennessee, Tn
Sat, 11 Feb 2023 00:03:55 +0000 quote
Gasher82nd wrote:
It all started when I was riding back in rain, thought water had got somewhere it shouldn't. Left it to try under cover for 2 weeks, it try to start but just turns over when I try to put small revs it then starts but if loose revs it dies and backfires. If when it goes I hold revs open a bit it will run but feels sluggish. Again after getting engine warm I loose revs it will die backfiring. I gave it full service changing belt, put mallossi variator on, with the new clutch spring, everything and still does same
check your spark plug and probably replace , also look at the spark plug cap really closely , might be cracked thus causing arcing and not getting enough juice to the spark plug.
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Gasher82nd
Sat, 11 Feb 2023 03:32:02 +0000
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Piaggio MP3 400 2007
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Gasher82nd
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Piaggio MP3 400 2007
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Sat, 11 Feb 2023 03:32:02 +0000 quote
Used 2 new plugs didn't make difference.
  DoubleGood Design  
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