Sun Sep 11, 2022 12:32 pm

Member
2007 Piaggio X9 500, 2009 Piaggio MP3 400ie
Joined: 19 Mar 2017
Posts: 10
Location: Findlay, Ohio
 
Member
2007 Piaggio X9 500, 2009 Piaggio MP3 400ie
Joined: 19 Mar 2017
Posts: 10
Location: Findlay, Ohio
Sun Sep 11, 2022 12:32 pm linkquote
Hello. First post.

I am a motorcycle mechanic and have wrenched on motorcycles all my life. I own 2 Piaggio scooters, an X9 500ie and a MP3 400 ie. I gave my X9 to my oldest son who lives with me and I drive the MP3 daily from home to my shop.

I was having issues with the tilt lock triggering the horn 5 times, a warning that the hydraulic pressure is insufficient.

In response, I bled the lines. Worked fine for a day or so, then again the alarm.

I reverse bled the lines thinking that due to the length, there was air becoming trapped. Again, worked fine for a day, then again the alarm.

Took apart the front end again, and began hunting around. On the tilt lock mechanical/electrical unit, under the plastic cover, I found the culprit. The tilt lock master cylinder tie rod was broken. This connects the mechanically operated lever to the top of the master cylinder pushrod on the mechanical/electrical tilt lock mechanism. Sometimes it was lining up and providing enough pressure on the master cylinder arm, and other times, it wasn't causing the alarm. It was exasperating trying to find this but I'm glad I did.

To make matters more annoying, this critical part is not in the fiche! Shame on you Piaggio!

I searched everywhere and could not find it to save my life. I literally stumbled upon in on an Italian site and was then able to get a part number (647728) and a picture.

I've ordered the little bugger from AF1 and will replace it as soon as it arrives. I suspect this will rectify the problem entirely.

If you have an issue like mine, and you pop off that plastic cover on your tilt lock assembly, look for the broken tie rod at the top where the master cylinder connects to the mechanical arm. You will most likely find yours broken too.











Sun Sep 11, 2022 1:56 pm

Veni, Vidi, Posti
MP3 500, GTS 250 (both 2008 MY), 2013 Piaggio BV 350, 2014 Can Am Spyder RT
Joined: 02 Mar 2013
Posts: 7050
Location: Madison, Wisconsin
 
Veni, Vidi, Posti
MP3 500, GTS 250 (both 2008 MY), 2013 Piaggio BV 350, 2014 Can Am Spyder RT
Joined: 02 Mar 2013
Posts: 7050
Location: Madison, Wisconsin
Sun Sep 11, 2022 1:56 pm linkquote

That's a new one.

Excellent catch; usually it's something else (as you noted, air, with the most common "something broke" root cause being the pressure sensor having a small leak).

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