Modern Vespa

Recently my saddle sensor is malfunctioning. When I get off the bike it is not working. Normally if you hit the throttle the bike bogs out. For some reason the other day my bike jumped forward. Crashing into a wall. Does anyone have any ideas of a fix for this? Thank you in advance.

I have spare seat sensor if you need one. front of seat cover must come off to replace though. you can also just install 1k-2k ohm resistors in its place

Thank you.
I will try that. As I live in Japan. Finding parts will be a trick. Lol.

the resistor ELIMINATES the sensor and WILLl cause what the op described in the first post.

Thank you for the info.
If possible I would like to restore the sensor.
I wonder if I could reset the system to get it back.

no reset. just check it with a multimeter to ensure the contacts open and close. if the sensor is bad the only way to get a new one from piaggio is buying a complete seat. highly recommend finding a used one thru ebay. you can use any of the mp3 model seats for the sensor as that is the same in all, just have to remove it an install it into your seat if you get a different model seat.

That sound good. Thank you. I will check into a new seat.

Update your profile when you have a chance so we know which MP3 you have.

Example...
Finding seats for the older MP3/250 and MP3/400 are easy, same seat and plenty show up on ebay.com

On my MP3/250, I have the Piaggo OEM Gel seat, and its very nice.
I got mine at easyparts.nl

Good luck with your problem...
Keith,
Marietta, GA

That is a great idea. Thank you.