Thanks for telling me to paint my belt covers!!!

[Capo]

Belt tensioner bearings have an arduous duty, they have high loading, get hot and rely on the prelube.
I changed mine for ceramic.

[corey]

wellp.. i'll be checking mine before i start it up again.

[eichh]

I read this thread 2 hours ago and I felt compelled to check my belts and bearings as well. Everything was good but I had to be sure.

[ghosthound]

Belt tensioner bearings have an arduous duty, they have high loading, get hot and rely on the prelube.
I changed mine for ceramic.

what did they run you?

ceramic bearings are way expensive.  I was considering getting some for my bike (of th pedal variety) but it was 100 bucks for a small bearing about 1.5 cm in diameter.

[spinned]

I like the open speedymoto belt covers too.

[COWBOY]

what did they run you?

+1.   That's an interesting option but I'd like more info and your experience with them so far.

[Ivan]

Belt tensioner bearings have an arduous duty, they have high loading, get hot and rely on the prelube.
I changed mine for ceramic.

Got a P/N for the ceramic bearing?

[JTMOTO]

part number???

[Monstro]

Let me guess - S2R1000?

There were a lot of those bikes that had the belt tension spec that was too tight.  This lead to.. exactly what happened to you. 

It happened exacltly the same to may 06 S2R100.
Bearings gone, and belt was ready to brake. The dealer saw it and warned me on the 6 miles service.

Now and then I get the covers out to check hows everything going.

Those Fast italian Machines... - just like children: a lot of fun, but a lot to worry about.

[NAKID]

To the OP, I would ask you dealer about a good faith warranty. Those bearings are sealed and aren't a maintenance item...

[stopintime]

To the OP, I would ask you dealer about a good faith warranty. Those bearings are sealed and aren't a maintenance item...

+1

In my country a consumer law states that any product which is clearly supposed to last longer than the mandatory 2 years warranty has to be covered by warranty for it's entire life expectancy. This might of course not help you, but the point is that you should have them replaced since they're not supposed to cave after just 4k miles. Tell your dealer we said so

[Capo]

I just gave the bearing numbers to the supplier and he matched them, they run about £65.
In the US, Boca Bearings seems the best supply www.bocabearings.com

I was surprised that my supplier even came up with ceramic main bearings, given that even the std items are somewhat difficult to find.
A complete set of ceramic bearings (including the front wheel) runs about a $1000.

[COWBOY]

The Ducati OEM part number for the 4 bearings in the timing belt assembly for my 05 S2R is  70240691a

When I plug that into the Ducati Omaha database it comes up with

BEARING 1000 MR-SS-MTS/05      for 14.99

Is this what you provided your supplier or should I look somewhere on the bike for the info.   Either way anyone want to translate the description.   I'm assuming each number, letter set is a size or classification but you know what they say about assuming.

[Capo]

The Ducati OEM part number for the 4 bearings in the timing belt assembly for my 05 S2R is  70240691a

When I plug that into the Ducati Omaha database it comes up with

BEARING 1000 MR-SS-MTS/05      for 14.99

Is this what you provided your supplier or should I look somewhere on the bike for the info.   Either way anyone want to translate the description.   I'm assuming each number, letter set is a size or classification but you know what they say about assuming.

I got the part numbers off of the bearings, in the case of the Desmoquattro these are  Movable Belt Roller 61004 2RS1+40, Fixed Belt Roller 6003-2RSH/C3

[Smokescreen]

one of the cam tension pulleys on my S2R1K was siezed before 12K mile service.  This is one of those parts you are supposed to check every few thousand miles. 

YES, Ducati does stipulate higher belt tensions on the DS bikes than they did on previous motors.  NO they haven't changed back...

While I don't think Ducati is any more infallible than the pope, I do think they've been making the desmoduo long enough to be the uncontested experts in that field.  Leave it tight, just like the book says, and just do you preventative maintenance and you'll be alright. 

You know, the bike didn't run well while the tensioner was toast, so that was kind of an indicator to the issue