Wed, 23 Nov 2022 00:17:58 +0000

Lurker
2007 GTS250
Joined: Sun, 31 Oct 2021 20:51:11 +0000
Posts: 2

 
Lurker
2007 GTS250
Joined: Sun, 31 Oct 2021 20:51:11 +0000
Posts: 2

Wed, 23 Nov 2022 00:17:58 +0000 linkquote
There isn't a certain time the scooter quits running. I've seemed to isolate the issue to the ignition switch. If I get all the associated scooter stopped running, I can turn the ignition key slightly to the stop and the scooter continues to run. Sometimes the scooter is moving at slow speeds, other times- faster.
I recently replaced the battery, and the anomaly still continues. The engine doesn't hesitate before shutting down. It goes cold steel. I've managed to get it to the side of the road several times and I cycle the key switch and it restarts and I continue with my ride.
I believe there is something going on inside the ignition switch as a slight key movement will have a resultant effect, one way or the other.
Today, I turned the key fully to the right and I promptly got all the advisory lights, I slightly moved it back to the left ( not to full detent) and the advisory lights extinguished and the scooter resumed normal operation.
I suspect it's something internal with the ignition switch or a loose wire. I would think if it's a loose wire, there would be a higher rate of occurrence.
Any thoughts would be greatly appreciated.// jt
Wed, 23 Nov 2022 00:39:36 +0000

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: Sun, 26 Aug 2007 20:16:15 +0000
Posts: 41692
Location: Pleasant Hill, CA
 
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: Sun, 26 Aug 2007 20:16:15 +0000
Posts: 41692
Location: Pleasant Hill, CA
Wed, 23 Nov 2022 00:39:36 +0000 linkquote
The ignition switch is cheap and easy enough to replace. This is not an uncommon problem - https://manuals.wotmeworry.org.uk/Vespa/GTS250/GTS250%20Parts%20Diagrams.pdf will give you the part number.
Wed, 23 Nov 2022 00:40:18 +0000

Veni, Vidi, Posti
GTS 300, Buddy 125
Joined: Sat, 05 Apr 2008 22:51:53 +0000
Posts: 8381
Location: Knoxville, TN
 
Veni, Vidi, Posti
GTS 300, Buddy 125
Joined: Sat, 05 Apr 2008 22:51:53 +0000
Posts: 8381
Location: Knoxville, TN
Wed, 23 Nov 2022 00:40:18 +0000 linkquote
I had similar symptoms with my 2006 GTS. Several shops couldn't find the issue including AF1Racing which diagnosed fuel issue and replaced all the fuel lines. That helped but didn't completely fix the issue. . A local independent finally found and fixed it. Turned out to be a cracked fuel injector.
Wed, 23 Nov 2022 21:39:48 +0000

Hooked
MP3 250 & Sei Giorni 300 HPE
Joined: Fri, 28 Feb 2014 03:10:36 +0000
Posts: 126
Location: Auckland,New Zealand
 
Hooked
MP3 250 & Sei Giorni 300 HPE
Joined: Fri, 28 Feb 2014 03:10:36 +0000
Posts: 126
Location: Auckland,New Zealand
Wed, 23 Nov 2022 21:39:48 +0000 linkquote
My 2020 Sei Giorni cut out while riding on two occasions-in traffic. Very scary ! I performed all the electrical system checks-as you did. Next ride fault reoccurred. Bike was still under warranty, only done 6000Km, so dealer collected it and although the diagnostic check showed no fault he replaced the contact block which is at the rear of the ignition switch assembly. He reckoned the faulty component may have been affected by my small key fob swinging on the end of the key.
Bike has run perfectly since; complete with key fob
Wed, 23 Nov 2022 22:30:46 +0000

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: Sun, 26 Aug 2007 20:16:15 +0000
Posts: 41692
Location: Pleasant Hill, CA
 
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: Sun, 26 Aug 2007 20:16:15 +0000
Posts: 41692
Location: Pleasant Hill, CA
Wed, 23 Nov 2022 22:30:46 +0000 linkquote
spdtwn wrote:
My 2020 Sei Giorni cut out while riding on two occasions-in traffic. Very scary ! I performed all the electrical system checks-as you did. Next ride fault reoccurred. Bike was still under warranty, only done 6000Km, so dealer collected it and although the diagnostic check showed no fault he replaced the contact block which is at the rear of the ignition switch assembly. He reckoned the faulty component may have been affected by my small key fob swinging on the end of the key.
Bike has run perfectly since; complete with key fob
That 'contact block' IS the ignition switch.
Thu, 24 Nov 2022 03:33:21 +0000

Veni, Vidi, Posti
2009 GTV250 (Gone), 2003 Inder trailer (also gone), 2001 BMW R1100RT
Joined: Thu, 25 Jun 2009 00:30:36 +0000
Posts: 5578
Location: Santa Cruz California
 
Veni, Vidi, Posti
2009 GTV250 (Gone), 2003 Inder trailer (also gone), 2001 BMW R1100RT
Joined: Thu, 25 Jun 2009 00:30:36 +0000
Posts: 5578
Location: Santa Cruz California
Thu, 24 Nov 2022 03:33:21 +0000 linkquote
Jskyking58 wrote:
There isn't a certain time the scooter quits running. I've seemed to isolate the issue to the ignition switch. If I get all the associated scooter stopped running, I can turn the ignition key slightly to the stop and the scooter continues to run. Sometimes the scooter is moving at slow speeds, other times- faster.
I recently replaced the battery, and the anomaly still continues. The engine doesn't hesitate before shutting down. It goes cold steel. I've managed to get it to the side of the road several times and I cycle the key switch and it restarts and I continue with my ride.
I believe there is something going on inside the ignition switch as a slight key movement will have a resultant effect, one way or the other.
Today, I turned the key fully to the right and I promptly got all the advisory lights, I slightly moved it back to the left ( not to full detent) and the advisory lights extinguished and the scooter resumed normal operation.
I suspect it's something internal with the ignition switch or a loose wire. I would think if it's a loose wire, there would be a higher rate of occurrence.
Any thoughts would be greatly appreciated.// jt
Also be aware that most 250's suffered from a faulty fuel pump. Symptom was that the bike would run fine then die once the fuel pump got warm. After cooling down, bike would start and run but fail again once the fuel pump warmed up. Fuel pump is in the gas tank. Some people tried keeping their fuel tank full to keep the pump from over heating. Piaggio had a recall campaign. It took the dealer about 90 minutes to replace my 250 fuel pump. I don't know if the recall is still active. The issue, IIRC, is that a part of the fuel pump expands when it gets hot and prevents the pump motor from turning.

I'm not saying this is your problem but I wanted to make you aware of it if it turns out not to be the ignition switch.

Miguel
Thu, 24 Nov 2022 09:22:19 +0000

saggezza di scala
2009 'Burma Shave' Red GTS 250ie
Joined: Sat, 13 Mar 2010 17:13:49 +0000
Posts: 7007
Location: Israel
 
saggezza di scala
2009 'Burma Shave' Red GTS 250ie
Joined: Sat, 13 Mar 2010 17:13:49 +0000
Posts: 7007
Location: Israel
Thu, 24 Nov 2022 09:22:19 +0000 linkquote
I had similar unexplained momentary cut-out and engine shut down years ago on my 2009 GTS250.

I finally sourced the problem to the spark lead touching the exhaust pipe. The insulation had melted and when I went over a bump or flexed the frame just right the lead touched the metal exhaust pipe and shorted out.

The fix was to wrap the wire really well with electrical tape, and tie it away from the hot exhaust.
Thu, 24 Nov 2022 15:14:24 +0000

Veni, Vidi, Posti
2006 GTS 250
Joined: Tue, 22 Feb 2011 00:24:46 +0000
Posts: 10036
Location: KS USA
 
Veni, Vidi, Posti
2006 GTS 250
Joined: Tue, 22 Feb 2011 00:24:46 +0000
Posts: 10036
Location: KS USA
Thu, 24 Nov 2022 15:14:24 +0000 linkquote
I had exactly the same experience on my way to AmeriVespa eons ago. It was so disconcerting the complete loss of power at WOT. I discussed it with the mechanics they looked at my bike and told me that I was having a vapor lock.
   

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