Rear suspension adjustment
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Member
2009 Piaggio MP3 500ie
Joined: 30 Jul 2019
Posts: 5
Location: West Sacramento, CA
Sat Aug 03, 2019 10:14 pm quote
So I'm trying to adjust the suspension and I'm either doing something wrong, or I'm a weakling. I'm 6'2" and 330lbs. The bike is on default preload. I have the spanner and I've tried to budge it to the next preload but I cannot get it to move, and yes, I'm fairly certain I'm moving it in the right direction.
Bike is on center stand, should it not be? Or is it something completely obvious that I'm missing?

Help please!
Hooked
2008 fuoco.T3 guzzi california outfit
Joined: 19 Jul 2015
Posts: 187
Location: United Kingdom.
Sat Aug 03, 2019 11:38 pm quote
It should be no different to any other make of rear shock however what i found on my fuoco (usa mp3 500) is that you get a build up of dirt between the shock body and the very fragile alloy spring adjuster add water to the dirt and you get rust and corrosion . On top of this the alloy adjusters are very weak and it's common to find that they are broken. . I would remove the shocks and inspect them closely .
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 37389
Location: Pleasant Hill, CA
Sun Aug 04, 2019 2:18 am quote
If the adjusting ring wasn't given some extra grease or other protection from corrosion right from the start then you've probably got a completely stuck ring. If you do manage to turn it, I bet it'll disintegrate.

Note, in the UK, this would be an immediate MOT failure, as I mentioned some years ago:
100% MOT failure rate on '07 MP3 rear shocks
Enthusiast
2016 MP3 500 Sport
Joined: 21 Jun 2007
Posts: 98
Location: Indianapolis, Indiana
Sun Aug 04, 2019 6:13 am quote
Help with adjusting pre-load
The easiest way for me is to spray the shock and adjuster ring with a little WD-40 and then clamp onto the adjustment wrench with a pair of vice grips.

Marty
Hooked
2008 fuoco.T3 guzzi california outfit
Joined: 19 Jul 2015
Posts: 187
Location: United Kingdom.
Sun Aug 04, 2019 11:51 am quote
Re: Help with adjusting pre-load
drawnon wrote:
The easiest way for me is to spray the shock and adjuster ring with a little WD-40 and then clamp onto the adjustment wrench with a pair of vice grips.

Marty
Hooked
2019 MP3 500hpe Sport
Joined: 03 Nov 2014
Posts: 435
Location: Germany
Tue Aug 06, 2019 1:58 am quote
I would recommend some penetrating oil overnight and see what happens. Be liberal with the spray and allow it to soak in. May need to give it a second just to the sake of it so that you don't break anything. WD-40 is not really a good penetrating spray. More for a quick lube of something or cleaning purposes.
Veni, Vidi, Posti
Neutrino MP3 492.7 AK, 2013 Moto Guzzi Norge
Joined: 29 Mar 2008
Posts: 21298
Location: Harriman, Tennessee, Tn
Tue Aug 06, 2019 5:02 am quote
new200guy wrote:
I would recommend some penetrating oil overnight and see what happens. Be liberal with the spray and allow it to soak in. May need to give it a second just to the sake of it so that you don't break anything. WD-40 is not really a good penetrating spray. More for a quick lube of something or cleaning purposes.
wd does a great job in removing sticker glue and road bugs and tar, be sure though to follow up with a decent wax though.
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