Groan when leaning
OP
JackdawFool
Mon, 10 Jul 2023 18:38:30 +0000
Member
MP3 500
Joined: Fri, 08 May 2009 18:46:38 +0000
Posts: 16
Location: CT
 
JackdawFool
Member
MP3 500
Joined: Fri, 08 May 2009 18:46:38 +0000
Posts: 16
Location: CT
Mon, 10 Jul 2023 18:38:30 +0000 quote
Haven't ridden my 2008 mp3 500 for 1.5 years. It's been garaged on the center stand with the tilt lock off.

Testing things out today on the stationary bike and I found there is a groaning noise from the front end when leaning the bike in either direction - but only with the front brake engaged. When the front brake isn't engaged, no noise at all when leaning. The tilt lock appears to be functioning normally.

Front brake doesn't appear to be slipping... The noise seems to be coming from the area of the tilting mechanism (haven't disassembled anything to see if I can tell what is going on), but I don't understand what the application of the front brakes would have to do with it.

Anyone have any tips on where to start looking? Haven't taken it out for a test ride yet... Want to know what the cause of the noise is first. Thanks!
jimc
Mon, 10 Jul 2023 21:50:11 +0000
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: Sun, 26 Aug 2007 20:16:15 +0000
Posts: 42779
Location: Pleasant Hill, CA
 
jimc
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: Sun, 26 Aug 2007 20:16:15 +0000
Posts: 42779
Location: Pleasant Hill, CA
Mon, 10 Jul 2023 21:50:11 +0000 quote
Having the brakes on locks the suspension somewhat. This is similar to what happens when you apply the rear brake, the engine noise seems to go faster. that isn't the case of course, it's just that with the rear brake engaged and the rear suspension locked somewhat, the resonant frequency of the whole unsprung weight changes.

So back to the front brakes - with the suspension somewhat locked, there'll be some resistance to tilting the bike on an MP3. The bits resisting might well moan and groan.
old as dirt
Mon, 10 Jul 2023 23:20:18 +0000
Veni, Vidi, Posti
Neutrino MP3 492.7 AK, 2013 Moto Guzzi Norge
Joined: Sun, 30 Mar 2008 04:38:24 +0000
Posts: 22245
Location: Harriman, Tennessee, Tn
 
old as dirt
Veni, Vidi, Posti
Neutrino MP3 492.7 AK, 2013 Moto Guzzi Norge
Joined: Sun, 30 Mar 2008 04:38:24 +0000
Posts: 22245
Location: Harriman, Tennessee, Tn
Mon, 10 Jul 2023 23:20:18 +0000 quote
you would groan and moan too if left in the same spot for 1.5 yrs then try and move.

ever watch the wizard of oz and see the part of the tin man when they first found him?
oldgoat
Tue, 11 Jul 2023 03:52:39 +0000
Enthusiast
2009 mp3
Joined: Fri, 24 Feb 2023 01:41:57 +0000
Posts: 50
Location: Brisbane
 
oldgoat
Enthusiast
2009 mp3
Joined: Fri, 24 Feb 2023 01:41:57 +0000
Posts: 50
Location: Brisbane
Tue, 11 Jul 2023 03:52:39 +0000 quote
Could be the pads rubbing on a rusty tilt lock quadrant
flybynight
Tue, 11 Jul 2023 23:42:45 +0000
Enthusiast
MP3 500 HPE 2019
Joined: Tue, 28 Jun 2022 15:23:04 +0000
Posts: 75

 
flybynight
Enthusiast
MP3 500 HPE 2019
Joined: Tue, 28 Jun 2022 15:23:04 +0000
Posts: 75
Tue, 11 Jul 2023 23:42:45 +0000 quote
Probably a bit of grime and rust on the pads and disc, give it a ride using brake a lot to clean it up, and then see if it still moans
sbaert
Wed, 12 Jul 2023 15:24:59 +0000
Molto Verboso
2015 MP3 500 ie Business
Joined: Tue, 29 Oct 2019 17:22:26 +0000
Posts: 1061
Location: Belgium
 
sbaert
Molto Verboso
2015 MP3 500 ie Business
Joined: Tue, 29 Oct 2019 17:22:26 +0000
Posts: 1061
Location: Belgium
Wed, 12 Jul 2023 15:24:59 +0000 quote
"Groan when leaning" tells me potential noisy bearing(s) in the tilt lock system.
OP
JackdawFool
Wed, 26 Jul 2023 01:46:51 +0000
Member
MP3 500
Joined: Fri, 08 May 2009 18:46:38 +0000
Posts: 16
Location: CT
 
JackdawFool
Member
MP3 500
Joined: Fri, 08 May 2009 18:46:38 +0000
Posts: 16
Location: CT
Wed, 26 Jul 2023 01:46:51 +0000 quote
Just wanted to say thanks for the replies and to report the groan is mostly gone after taking it out for a few rides.
pinheadh78
Sat, 29 Jul 2023 09:03:57 +0000
Hooked
2016 Mp3 500ie Sport
Joined: Sun, 28 Jul 2019 16:17:25 +0000
Posts: 236
Location: California
 
pinheadh78
Hooked
2016 Mp3 500ie Sport
Joined: Sun, 28 Jul 2019 16:17:25 +0000
Posts: 236
Location: California
Sat, 29 Jul 2023 09:03:57 +0000 quote
So now if the bike starts groaning again while leaned over on a great ride.... its a sign the bike is having as much fun as you are.

Sorry, I'll see myself to the shame corner and stay there till forgiven by the mods
  DoubleGood Design  
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