[egicar]

Hi all,
I'd like to know if every Scrambler has the same mounting system on the swingarm.
Some of us have noticed damages on the silent-block. Maybe it is caused by the mounting system, because the hole for the special screw pass through the swingarm, tightening the silent-block to the swingarm, instead of let it free to rotate (just a little bit) around the special screw, avoiding the torsion of the rubber of the silent-block.
But I've seen some others that never had that issue.
Maybe Ducati have made some update of this system.
Could some of us who have changed the shock confirm my theory?

 

[egicar]

Here is my mod to avoid torsions on the silent-block.
The bike is very dirty, cause I have ridden under the rain coming back home from work.

 

[Derek]

I can't really see from the photographs what your modification entails but I believe you are wrong in your assumption that the silentbloc bush should rotate around the bolt. The silentbloc bushing should be clamped so that all rotational movement is taken by the rubber in torsion. Yes it will wear out but should last quite a few years.
The bush has a metal sleeve which is not a bush, nor is the bolt hardened to take a rotating motion. If the silentbloc bush is allowed to rotate on the bolt, the sleeve and the bolt will wear prematurely.

 

[egicar]

I can't really see from the photographs what your modification entails but I believe you are wrong in your assumption that the silentbloc bush should rotate around the bolt. The silentbloc bushing should be clamped so that all rotational movement is taken by the rubber in torsion. Yes it will wear out but should last quite a few years.
The bush has a metal sleeve which is not a bush, nor is the bolt hardened to take a rotating motion. If the silentbloc bush is allowed to rotate on the bolt, the sleeve and the bolt will wear prematurely.

I know and agree with what you mean, but I prefer my way to wear the silent-block. I think it will take many years, instead of some month like I've seen on the silent-block rubber of my stock shock.

Here is the sketch of my solution.

 

[Derek]

Looking at your drawing I'm reckoning that the bolt tightens down against the 7mm washer below the head and the 18mm x 16mm Dia sleeve bears lightly against the sleeve of the silentbloc bush but doesn't clamp it tight, allowing some movement.
Well time will tell how it works out. Good luck with it.

 

[egicar]

Looking at your drawing I'm reckoning that the bolt tightens down against the 7mm washer below the head and the 18mm x 16mm Dia sleeve bears lightly against the sleeve of the silentbloc bush but doesn't clamp it tight, allowing some movement.
Well time will tell how it works out. Good luck with it.

Hi Derek, it was my intention to leave the silent-block free to rotate (just a little bit) around the bolt, instead of block it to the swingarm. I'll put in this point a good grease and I'll clean often this point with compressed air and a bit of wd40, before the grease.