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 CARC and swingarm service

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guzziownr
Biondino
Biondino


Posts : 216
Join date : 2013-12-23

PostSubject: CARC and swingarm service   Fri Jul 10, 2015 5:12 am

I put an eyehook in the garage to hang the GRiSO from and have been doing research on swingarm maintenance for my new acquisition ('07 G11).

This report shows a Stelvio: [You must be registered and logged in to see this link.]

Did anyone do something similar for the GRiSO or is this close enough to be useful. DW
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wardentm
Nibbio
Nibbio


Posts : 516
Join date : 2015-05-16
Age : 64

PostSubject: Re: CARC and swingarm service   Fri Jul 10, 2015 5:50 am

Hello DW
Thanks for this post, I like you have recently purchased a 07 G11, mine has 57,000ks on the clock.
From reading thru the posts I need to do this job sooner rather than later and was a bit apprehensive but with your post things are now a bit clearer even thou its a Stelvio.
Regards from down under in Tasmania.
Ciao
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guzziownr
Biondino
Biondino


Posts : 216
Join date : 2013-12-23

PostSubject: Re: CARC and swingarm service   Fri Jul 10, 2015 6:05 am

Mine has 8K and has obviously led a pampered life.  I am going to change the rear shock for one from a Stelvio so I thought I would do this for a little extra effort.

I drilled a hole through the main beam in the garage and put this in.  The bolt is rated at 550 lbs and the strap at 1,000 so should be good.

[You must be registered and logged in to see this image.]
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Guzzi Cat
Grignapoco
Grignapoco


Posts : 178
Join date : 2014-09-02

PostSubject: Re: CARC and swingarm service   Fri Jul 10, 2015 10:40 am

Hi Guzziownr,

I done the same job on my G12 last winter and for the peace of mind it is well worth doing.

The link showing it been done on the Stelvio is a very good tutorial and the job is very similar on the GRiSO.

On the GRiSO I removed the foot rest supports and used trailer tie down straps hung from the ceiling joists in the Garage to lift the rear end off the ground. The brake line on the right side foot rest hanger does Not need to be disconnected,  just tie the hanger out of the way.
I clamped the front wheel in a wheel chock and attached the lifting straps to a strong point on the frame at either side at the rear.

And when you're in there make sure and grease the suspension linkage bearings. It makes it handy for torquing the swingarm if you have the special tool, if not you can tighten them by feel with a C wrench but you dont want to over tighten them!!

Mine weren't dry but at least its a job I wont have to return to for a while.
Take your time and good luck. Thumbs Up
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guzziownr
Biondino
Biondino


Posts : 216
Join date : 2013-12-23

PostSubject: Re: CARC and swingarm service   Tue Jul 14, 2015 6:16 am

Thanks for the advice Cat I had the same experience.  Grease where it should be  It took all day due to interruptions but it was nice to clean and grease, locktite and never-seeze everything that needed it.

Two tools that not everybody has in the garage were the castle nut thingy available from Guzzitech and an XXL Hex for the axle. I recommend getting both before you start.

I made a pin out of an old bolt to help get the wheel back on.  Screw it in, put the wheel on put in three bolts and remove.  Not needed per se, but useful.

Going riding now to do suspension tuning and then a hot synch.  It still seems a little vibey.
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guzziownr
Biondino
Biondino


Posts : 216
Join date : 2013-12-23

PostSubject: Re: CARC and swingarm service   Tue Jul 14, 2015 11:51 am

The hot synch went well, synched at 4500 RPM as per Mr. Roper.  The '09 Stelvio shock is looking good.  I will adjust it softer as a trial but now it is firm with good road feel without sharp impacts or bottoming.  I weigh #225 with no gear so the stock shock was overmatched.

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Beefier spring and longer stroke of the Stelvio shock:

[You must be registered and logged in to see this image.]
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dskustoms
Montanarolo
Montanarolo


Posts : 16
Join date : 2014-04-28

PostSubject: Re: CARC and swingarm service   Sun Jul 19, 2015 8:10 am

Does going to the Stelvio shock give you more spring options?
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guzziownr
Biondino
Biondino


Posts : 216
Join date : 2013-12-23

PostSubject: Re: CARC and swingarm service   Sun Jul 19, 2015 11:05 am

dskustoms wrote:
Does going to the Stelvio shock give you more spring options?

Spring options on the GRiSO are limited by diameter.  The advantage of the Stelvio shock is a bit more stroke.  I like the higher ride height and the stock spring suits me as well as it is sized for the extra "baggage" of Stelvio owners.

Here is an old post I found very informative:

[You must be registered and logged in to see this link.]

Member Uzidzit says:  "Probably one of the masters of the sachs rear shock is Martin at TD,  It sounds like you are running quite a bit of sag at the rear.  One thing that is odd on the GRiSO is that the rear shock stroke is very short!  and the linkage is pretty high ratio  (not a really good combo for oil control)  The better solution for the front end is to not drop it, but to raise the back end it has the same effect and actually gains ground clearance.  

Now for the real trick,  If you have a penske built you can get it with a longer stroke.  I built mine from an old gsxr triple clicker I had.  I increased the shock len. 6mm (that is about .900" at the rear end), I did this not with ride ht. adjuster but by making the stroke of the shock about 34mm instead of 27mm.  the bump stop makes the wheel position in upper end of travel at the same place as it was stock, but I picked up ~1.00" of rear wheel travel and more piston stroke (really good for control) and having a real useable ~3.75 4.00" of travel is nice, you really only have about 2.2-2.5" of travel left with 38mm of sag in the rear. and the stock shock len.

There is another problem with the GRiSO (any carc bike really) and that is the shock well is very small in diameter.  Any spring with a rate above 800lbs /in is a problem.  the solution is to use 1093 series OHLINS springs they are true 57mm id through the full series, Hyperco the id grows with rate above 750lbs, and thus by the time you get to the correct rates for the Guzzi they rub, 84mm od is the magic number. a 971lb Ohlins is 83mm od, a 950lb hyperco is 87mm."
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PostSubject: Re: CARC and swingarm service   Today at 8:39 pm

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