front brake pad fell off
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Member
gti 300
Joined: 12 Oct 2015
Posts: 5
Location: New York, NY
Tue Jan 01, 2019 10:53 am quote
Happy New Year Everyone. sorry my windows explorer was acting up and the post was pasted 3x.
Something really odd happened to me yesterday. When i was backing out of a parking spot, one of my two front brake pads fell out!!!! It was really scary thought if I were riding and it fell out.javascript:emoticon('') Only one of the two pads fell out, however, with one pad there is zero braking power on the front wheel. I have ordered new brake pads, but it scares me to think such thing can actually happen. Does anyone know if this has happened to anyone before? I took a picture of my break pad and it broke away from the housing that it was welded/glued on. Please refer to the photo. In other words the housing for the front brake pad is still there, the metal part, but the actual brake pad broke off. I have not changed my pads for a while, but they were not worn out. Should we change these pads every year?

IMG_2838.JPG
the brake pad where it broke off

IMG_2837.JPG

Veni, Vidi, Posti
Modded Vespa 2017 GTV 300, BMW 2017 C650GT, Ural 2019 Gear Up
Joined: 21 May 2017
Posts: 5632
Location: Downtown Toronto
Tue Jan 01, 2019 11:11 am quote
I'm the only one seeing this 3 times?

I think we need us a mod to move this to general and do a wee bit of housekeeping.

Happy New Year!
Ossessionato
09 190s taormina
Joined: 08 Apr 2010
Posts: 2082
Location: Googleville
Tue Jan 01, 2019 8:08 pm quote
What's the backing plate look like? Quick Google search says rust is the cause.
Ossessionato
2014 Commuter BV350(41,000)/2015 Scoot Life BV350(10,000)/2010 El Diablito SH150i(28,000)
Joined: 27 Dec 2013
Posts: 2260
Location: Orange Park Florida
Tue Jan 01, 2019 8:20 pm quote
Been there done that. My rear brake pad. Life is a gamble, roll them bones

img_20181018_105218_14276.jpg

Molto Verboso
Kymco AK550
Joined: 09 Feb 2008
Posts: 1119
Location: UK
Wed Jan 02, 2019 12:53 am quote
There is very little wear on this pad so I would guess it has been replaced quite recently. Possibly a poor quality pattern part? If you clean up the backing plate can you see any manufacturers name or part number?
Member
gti 300
Joined: 12 Oct 2015
Posts: 5
Location: New York, NY
Wed Jan 02, 2019 4:35 am quote
front brake pad fell off
thanks everyone. pretty scary idea.
I am changing the pads this weekend. I will see who the manufacturer is. it should be OEM...
I guess we really shouldn't ride our vespas in the winter time because of the salt, etc, it rusts out bike scooter...
Molto Verboso
1979 P150X, 1983 P200E, 1987 T5, 1996 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 1617
Location: Veria, Greece
Wed Jan 02, 2019 4:50 am quote
Unfortunately, this is pretty normal with Heng Tong (Piaggio OEM supplier)...
Hooked
2010 gts 300 super. 09 MP3 500 lite
Joined: 02 Apr 2013
Posts: 442
Location: tampa
Wed Jan 02, 2019 6:15 am quote
one of my mp3 pads did this. it was marked ferodo on the pad. it still brake fine though as pad was trapped in caliper. replaced with ebc and very happy with them. the blue pad is stock from piaggio. I wouldnt worry too much about it happening again.

i dont think rust is the cause. this likely happens when pad is good and hot then suddenly cooled. the rust happens after is breaks off.
Veni, Vidi, Posti
2007 LX150 2015 GTS 2013 BV 350
Joined: 13 Sep 2012
Posts: 8753
Location: Fond du Lac, Wisconsin
Wed Jan 02, 2019 8:15 am quote
Re: front brake pad fell off
diffuzion wrote:
Should we change these pads every year?
Under normal circumstances I'd say it's a silly idea, but it does beg the question with the evidence. OTOH, I'd guess the failure could happen at any time. Maybe it's just the picture (or me), but I'm not seeing corrosion.

If this is a not uncommon issue as SaFiS states, it's a bit scary. Not having brakes when you need them could get somebody hurt...or killed.
Molto Verboso
Vespa GTS 250ie
Joined: 02 Jun 2015
Posts: 1218
Location: San Francisco Bay Area
Wed Jan 02, 2019 8:39 am quote
THAT is NOT cool!
Member
gti 300
Joined: 12 Oct 2015
Posts: 5
Location: New York, NY
Wed Jan 02, 2019 7:24 pm quote
front brake pad fell off
I have a ducati icon as well, and i am getting ready to sell my ducati and vespa to get something with three wheels. If a pad breaks off at least i will have additional breaking power.
Hooked
Piaggio MP3 250, BigBeo
Joined: 30 May 2015
Posts: 136
Location: Chelyabinsk, Russia
Thu Jan 03, 2019 6:10 am quote
I guess that might be caused by ice. It "sticks" the friction pad to the brake disk
Molto Verboso
Vespa GTS 250ie
Joined: 02 Jun 2015
Posts: 1218
Location: San Francisco Bay Area
Thu Jan 03, 2019 7:44 am quote
+1, good point!
Ice may be stronger than glue!
Don't set parking brakes when you're parked in an area where ice may form.
Addicted
GTS250, P200E
Joined: 11 May 2008
Posts: 728
Location: Oshawa, Ontario, Canada
Thu Jan 03, 2019 8:23 am quote
Watch for brake fluid leaks
If you applied the brakes after the pad fell out, the piston could have travelled farther than normal, exposing an unused rough area to the piston seal. This could result in a brake fluid leak in the near future. At least that is the way it works on some cars.

Please keep watch.

Cheers,
Bob
Hooked
Piaggio MP3 250, BigBeo
Joined: 30 May 2015
Posts: 136
Location: Chelyabinsk, Russia
Thu Jan 03, 2019 10:05 pm quote
Nope, here the piston would expose the "inner" clean and smooth area to air. That would harm nothing, but before pushing it back, would be better to clean the exposed area of piston. And nothing wrong if lubricate it with special brake assemblying paste like TRW PFG 110 or Ate 03.9902-0511.2
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