When I fully compress the rear shock, the rebound appears to be undampened for the first 80% of the return travel, then is dampened for the last 20% of travel.
Is it low on oil/N2? Service or replace it?
servicing a marzocchi rear shock
- torpedo51
- Posts: 17
- Joined: Mon Jun 06, 2011 6:31 am
- model: 907 I.E.
- year: 1991
- Location: Los Angeles,CA & Reno,NV
servicing a marzocchi rear shock
Making a mechanic out of me: 1988 Paso 750 | 1991 907ie
- paso750
- paso grand pooh-bah
- Posts: 5558
- Joined: Sun Jul 18, 2004 12:00 am
- model: 750 Paso
- year: 1987
- Location: southern Germany
Re: servicing a marzocchi rear shock
Servicing is for sure cheaper. There`re used ones for sale once in a while but one never knows their real condition.
If you decide to service yours take a close look at the damper rod. If the chrome is chipped or damaged that maybe the reason why an oil seal leaked. Over the time you`ll also notice that the swingarm linkage is oily.
I had that on my first shock so I took it to the main Marzocchi importer. They told me I`d need to replace it as it was impossible to find a spare damper rod. According to them polishing or rechroming was no durable solution.
So it would be important to find out why the shock doesn`t work properly anymore, if due to a damage or just as a matter of age.
G.
If you decide to service yours take a close look at the damper rod. If the chrome is chipped or damaged that maybe the reason why an oil seal leaked. Over the time you`ll also notice that the swingarm linkage is oily.
I had that on my first shock so I took it to the main Marzocchi importer. They told me I`d need to replace it as it was impossible to find a spare damper rod. According to them polishing or rechroming was no durable solution.
So it would be important to find out why the shock doesn`t work properly anymore, if due to a damage or just as a matter of age.
G.
- torpedo51
- Posts: 17
- Joined: Mon Jun 06, 2011 6:31 am
- model: 907 I.E.
- year: 1991
- Location: Los Angeles,CA & Reno,NV
Re: servicing a marzocchi rear shock
Ok, I do understand the need for an undamaged shaft.
What affect does the N2 charge perform? Could this cure my rebound problem?
Is it possible to perform a "leakdown" test on the unit to verify the seals/o-rings are bad?
Can I add oil myself somewhere?
Do we have a manual for the specific unit used on our bikes?
I'm asking because whenever I go to a shop around here without some idea of what to expect, they flat out screw me.
What affect does the N2 charge perform? Could this cure my rebound problem?
Is it possible to perform a "leakdown" test on the unit to verify the seals/o-rings are bad?
Can I add oil myself somewhere?
Do we have a manual for the specific unit used on our bikes?
I'm asking because whenever I go to a shop around here without some idea of what to expect, they flat out screw me.
Making a mechanic out of me: 1988 Paso 750 | 1991 907ie
Re: servicing a marzocchi rear shock
when a shock is "bad" there is no way of fixing it unless it is completely overhauled.torpedo51 wrote:Ok, I do understand the need for an undamaged shaft.
What affect does the N2 charge perform? Could this cure my rebound problem?
Is it possible to perform a "leakdown" test on the unit to verify the seals/o-rings are bad?
Can I add oil myself somewhere?
Do we have a manual for the specific unit used on our bikes?
I'm asking because whenever I go to a shop around here without some idea of what to expect, they flat out screw me.
On ebay you can get the original Kit (30$?) and it is not a difficult job, however if you take it to a shop they will charge you at least 150$ plus parts (in Italy over 200...).
I just did mine and went through the "shop route" as i discovered that mi shock was in bad state as well as the other TWO I got from ebay....
Funny thing I ended using a PASO750 shock which was adapted by a specialist to the 907 (this will need very specific tools as the old unit has a nitrogen tank that can filled only with specific tools) and I have to say I was VERY VERY surprised of how well it works.
Ah yes, 2 weeks after doing all the mods, I found on Ebay a Marzocchi Duoshock unit, brand new, for less than 50$
- paso750
- paso grand pooh-bah
- Posts: 5558
- Joined: Sun Jul 18, 2004 12:00 am
- model: 750 Paso
- year: 1987
- Location: southern Germany
Re: servicing a marzocchi rear shock
Here`s the manual we have on the site
http://www.box.com/s/yaishmk894lgxoazkxzj
Adding oil is not possible unless you open the shock.
Isn`t that always so ?
G.
http://www.box.com/s/yaishmk894lgxoazkxzj
Adding oil is not possible unless you open the shock.
Ah yes, 2 weeks after doing all the mods, I found on Ebay a Marzocchi Duoshock unit, brand new, for less than 50$
Isn`t that always so ?
G.
- torpedo51
- Posts: 17
- Joined: Mon Jun 06, 2011 6:31 am
- model: 907 I.E.
- year: 1991
- Location: Los Angeles,CA & Reno,NV
Re: servicing a marzocchi rear shock
Help!
The shop that is rebuilding the shock can't find replacement seals or seal head.
Does anyone know where to source these parts or have a cross referenced part from another vendor? Its a 14mm ID with a 40mm OD. My seal head has the hex head to accept a wrench rather than two holes for a pin driver.
Thanks!
The shop that is rebuilding the shock can't find replacement seals or seal head.
Does anyone know where to source these parts or have a cross referenced part from another vendor? Its a 14mm ID with a 40mm OD. My seal head has the hex head to accept a wrench rather than two holes for a pin driver.
Thanks!
Making a mechanic out of me: 1988 Paso 750 | 1991 907ie
- paso750
- paso grand pooh-bah
- Posts: 5558
- Joined: Sun Jul 18, 2004 12:00 am
- model: 750 Paso
- year: 1987
- Location: southern Germany
Re: servicing a marzocchi rear shock
these two shops list the complete rebuild kit. They do list every part number so one needs to ask about availability.
http://www.store.commoto.com/ducatistor ... 76960.html
http://store.proitalia.com/ducati-oem-s ... 18422.html
Have you checked at a Ducati dealer with the part number (36640011A) ?
G.
http://www.store.commoto.com/ducatistor ... 76960.html
http://store.proitalia.com/ducati-oem-s ... 18422.html
Have you checked at a Ducati dealer with the part number (36640011A) ?
G.