Silentium muffler qustion

[JimLardassian]

Apologies if this has been dealt with before. I did not find anything when I did a search, but very willing to accept responsibility if I merely failed to find what is there.

My question is regarding Silentium mufflers. I have 3 here that are all slightly different from each other and I'm wondering what they were originally fitted to. One is 28.5 inches long with what I think of as a regular Brevetti Silentium Interfon-Special logo stamp and no part number. The other two are 25.5 inches long, one with the same Silentium stamp as the longer muffler, also with no part number, the other with no Silentium logo but MOTO DUCATI and IGM 0285 S.

If any one knows which was fitted to what, or what the differences are between them (other than the obvious length and stampings) I would appreciate any information.

Thank you

[Bevel bob]

If you are building a high performance 250 then the commonly sold replacement which can be fitted to several engine sizes is too restrictive . The Mach 1 / M3 narrowcase had a less restrictive bigger outlet silencer.

[LaceyDucati]

Jim

The one marked "Moto Ducati" will be an aftermarket replacement. The other 2 may be original, but some of the replica silencers are also marked up the same as the originals. If the chrome is poor and pitted it's probably original The internals of replica silencers vary and some are very restrictive others less so. Maybe post some pictures, none sound short enough to be SCR, but the style of the silencers will tell more.

Nigel

[A.I.M]

Jim,
My Spanish Mototrans scrambler had a 50cm / 19 ¾” long Silentium silencer.
The stamping on it was:
Silentium
Brevettato
MOTO DUCATI
I believe this was the original as I bought it at 3 years old from a neighbour, so I knew the history of the bike. I removed and lost the baffle at some point over the years.
Yours are too long to be SCR silencers.

Cheers,
Al

[mrkprsn]

Can you post a pic of your mufflers side by side?

[Ventodue]

As Nigel and Mark have said : only photos can help.

As you can imagine, many different types of silencers were fitted to Ducati singles over the years, varying not only according to model type but also according to the country in which each bike was sold.

So the widecase parts book 1968-73 alone has 11 different models (look on pages 30-32, under the heading 'SC'). And then there's all the n/c models, the Mototrans bikes, the 2-strokes, the non-bevel drives ...