Tue Aug 25, 2020 1:58 am

Lurker
Joined: 25 Aug 2020
Posts: 4

 
Lurker
Joined: 25 Aug 2020
Posts: 4

Tue Aug 25, 2020 1:58 am linkquote
I have a Piaggio MP3 2007 and I enjoy it very much. But the last time I was riding it, the engine light turns on (orange). I noticed that it happens when the engine is making more than 3000rpm and the light turns of at idle (below 2000 rpm).

What could be the issue here?
Tue Aug 25, 2020 5:29 am

Hooked
50cc Beo, MP3 400 2012, BigBeo 2003
Joined: 30 May 2015
Posts: 287
Location: Chelyabinsk, Russia
 
Hooked
50cc Beo, MP3 400 2012, BigBeo 2003
Joined: 30 May 2015
Posts: 287
Location: Chelyabinsk, Russia
Tue Aug 25, 2020 5:29 am linkquote
Just a guess: check voltage at battery at idle and over 3000.
Tue Aug 25, 2020 4:51 pm

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 39656
Location: Pleasant Hill, CA
 
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 39656
Location: Pleasant Hill, CA
Tue Aug 25, 2020 4:51 pm linkquote
^^^^
Your voltage regulator has died.

Replace it.

If this has been happening for a week or more, consider replacing the battery as well, as this will have been stressed by >17V being presented to it.
Wed Aug 26, 2020 5:55 am

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Joined: 25 Aug 2020
Posts: 4

 
Lurker
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Posts: 4

Wed Aug 26, 2020 5:55 am linkquote
Thanks!

My voltage regulator does this:

At idle, it gives between 13 and 14 volts. When I throttle more, even a bit, it goes up to 18 volts.

I'm not familiar with this. Is such a high voltage wrong?

Is a voltage regulator replaceable myself?
Wed Aug 26, 2020 5:57 am

Ossessionato
Gilera Fuoco 500ie
Joined: 11 Oct 2009
Posts: 4277
Location: Netherlands Olst
 
Ossessionato
Gilera Fuoco 500ie
Joined: 11 Oct 2009
Posts: 4277
Location: Netherlands Olst
Wed Aug 26, 2020 5:57 am linkquote
regulator got them in stock
Wed Aug 26, 2020 6:49 am

Hooked
Piaggio MP3 500
Joined: 21 Nov 2017
Posts: 303
Location: Austin, TX
 
Hooked
Piaggio MP3 500
Joined: 21 Nov 2017
Posts: 303
Location: Austin, TX
Wed Aug 26, 2020 6:49 am linkquote
Yes, you just need to locate it and remove a body panel to get to it, then the new one just plugs into the harness. But do it soon- 18V is way too high and it's stressing all your electrics from the ECU's to the battery, and could end up being very expensive.
Wed Aug 26, 2020 7:38 am

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 39656
Location: Pleasant Hill, CA
 
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 39656
Location: Pleasant Hill, CA
Wed Aug 26, 2020 7:38 am linkquote
gwbonline wrote:
Thanks!

My voltage regulator does this:

At idle, it gives between 13 and 14 volts. When I throttle more, even a bit, it goes up to 18 volts.

I'm not familiar with this. Is such a high voltage wrong?
YES!
Quote:
Is a voltage regulator replaceable myself?
Yes.
Fri Aug 28, 2020 10:13 am

Lurker
Joined: 25 Aug 2020
Posts: 4

 
Lurker
Joined: 25 Aug 2020
Posts: 4

Fri Aug 28, 2020 10:13 am linkquote
It was the voltage regulator. Replaced it with a second hand alternative and the engine light never turned on again. And the bike rides like a charm! Didn't know this makes such a difference.
Thu Sep 03, 2020 3:12 pm

Addicted
MP3 400 "Orion"
Joined: 01 Jul 2012
Posts: 952
Location: Northwest Ohio
 
Addicted
MP3 400 "Orion"
Joined: 01 Jul 2012
Posts: 952
Location: Northwest Ohio
Thu Sep 03, 2020 3:12 pm linkquote
I'm afraid this is what's happening with my machine. The symptoms sound exactly the same. Where do I find the regulator, what panels do I have to remove to get to it, and where's the best place to get a replacement?
Thu Sep 03, 2020 3:24 pm

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 39656
Location: Pleasant Hill, CA
 
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 39656
Location: Pleasant Hill, CA
Thu Sep 03, 2020 3:24 pm linkquote
Carolan wrote:
I'm afraid this is what's happening with my machine. The symptoms sound exactly the same. Where do I find the regulator, what panels do I have to remove to get to it, and where's the best place to get a replacement?
You can lead a horse to water...

Page 57 of the workshop manual:
https://manuals.wotmeworry.org.uk/Piaggio/Piaggio%20MP3/MP3%20400/

https://scooterpartsco.com/ricambi/080-oem/oem-voltage-regulator-for-vespa-250-300-piaggio-aprilia



Thu Sep 03, 2020 3:34 pm

Addicted
MP3 400 "Orion"
Joined: 01 Jul 2012
Posts: 952
Location: Northwest Ohio
 
Addicted
MP3 400 "Orion"
Joined: 01 Jul 2012
Posts: 952
Location: Northwest Ohio
Thu Sep 03, 2020 3:34 pm linkquote
Thank you.
jimc wrote:
Carolan wrote:
I'm afraid this is what's happening with my machine. The symptoms sound exactly the same. Where do I find the regulator, what panels do I have to remove to get to it, and where's the best place to get a replacement?
You can lead a horse to water...

Page 57 of the workshop manual:
https://manuals.wotmeworry.org.uk/Piaggio/Piaggio%20MP3/MP3%20400/

https://scooterpartsco.com/ricambi/080-oem/oem-voltage-regulator-for-vespa-250-300-piaggio-aprilia
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