amber engine warning light
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mp3 250cc 2008
Joined: 08 Mar 2019
Posts: 1
Location: lincoln
Fri Mar 08, 2019 6:50 am quote
hi all,
I have a 2008 MP3 250cc which has an amber warning light over 20mph.
As I have a newer 300cc MP3 I need to sell the 250cc so do not want to spend a fortune at a main dealer to find and repair the fault.
It starts first time and never misses a beat when out on the road.
Any ideas of what it might be would be welcome.
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 38630
Location: Pleasant Hill, CA
Fri Mar 08, 2019 9:14 am quote
Your voltage regulator has gone phut. To confirm, get a voltmeter and measure the battery voltage with the bike revving over 3000rpm. The voltage shouldn't rise above 14.8V. If you measure 17V or so then you need a new regulator, and possibly a new battery as the over-voltage kills them in double-quick time.
Gilera Fuoco 500ie
Joined: 11 Oct 2009
Posts: 4176
Location: Netherlands Olst
Sat Apr 13, 2019 11:32 pm quote
exhaust snesor could be the problem
2020 Piaggio MP3 500 hpe
Joined: 07 May 2019
Posts: 23
Location: Midwestern USA
Tue May 07, 2019 9:56 pm quote
Fixed mine with new O2 lambda sensor + spark plug
Had this problem on my 2007 MP3 250 and fixed it with a new lambda O2 sensor plus spark plug.
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