Rear Brake Caliper Bracket

[Mr Gazza]

I can't believe it....!

The powder coaters with the best reputation for many a country mile have lost my rear caliper bracket..!!

This is an urgent plea to any one who has one going spare that they would be prepared to sell to me.?

The fly in the ointment is that it is the 2000 model 900Sie. This one has the external brake torque rod which connects to the back of the footrest hanger at the engine.

I am assuming that this is a very model specific item, although the mounting of the torque rod is just via a special bolt at the caliper end. I am thinking that a normal bracket has a lug to engage into a retainer on the swinging arm?
Possibly even the internal diameters of the axle hole differ, as there are bushes that allow the bracket to pivot on the axle with swing arm motion.
So I am not sure sure if a ordinary caliper bracket can be used, or can be modified easily.

Any help will be very gatefully recieved......Of all the bits that go missing..!!!!:Furious:

Thanks in advance guys..

[Mr Gazza]

Just trawled ebay and as I suspected, the brackets normally have a large slotted lug to engage on a bolt or bobbin on the swinging arm.

Couldn't say if the axle hole is the same diameter from photos (and not having mine to hand..!) but that would be academic really as a standard one looks to be a little hard to modify and not look mauled.

.....No fingernails left now.:dizzy:

[Darren69]

What size axels does it have Gazza? If it's the smaller early type then you may get lucky and be able to get one from a 900 Superlight or 888/851 as I think these may be the same. If its the larger 25mm diameter like my S4 for instance then you probably won't be able to find one. I think Luigi Moto do a billet one for about £80.

[popelli]

got a caliper bracket but not sure if its what you are looking for

have you a photo of the bit you are looking for?

[Mr Gazza]

Thanks for the info re the cross referenced parts Darren.
The axle is 17mm, I guess that is "small". But the bracket runs on two steel top hats with an O.D. of 22mm and I think from memory that the bracket has a bush in the axle hole too.

Popelli.. This sound promising. Unfortunatly I didn't think to photograph the bit before I sent it away.
I have discovered that the part is called a rear caliper support.
It is an alloy casting or forging, and looks very similar to the normal bracket, except for the absence of the long slotted lug extending from the axle hole, which is the standard torque stay.

So mine is basically triangular with the top axle hole being 22mm and probably containing a bronze type bush. The lower two holes for the caliper are threaded M8, and there is a cutaway between those holes.
The bracket is cranked to offset it onto the disc, and the 22mm hole is in a raised boss.

Hope this helps in the absense of a picture...Maybe you could send a picture of yours and I would be able to say yay or nay.?

Thank you for your help..

[Darren69]

Is this like the pivot bush you mentioned?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=151145738935#ht_910wt_1200

[Dukedesmo]

Standard one looks like this;

http://www.ukmonster.co.uk/monster/attachment.php?attachmentid=17475&d=1387816345

[Dookbob]

Surely the part has got to be still on the premises of the powder coaters, it,s either lying in a pile of grit blast medium, or hanging on a bit of wire at the back of the oven, or it's fell off its bit of wire and is on the floor of the oven. What a bunch of prats they must be. Try sending them a quote for a new one and see if they don't buck up and look for it like they mean it.

[Dukedesmo]

Try sending them a quote for a new one and see if they don't buck up and look for it like they mean it.

Indeed, send them this link; http://japan.webike.net/products/2110641.html

and then see if they don't miraculously find yours... ;)

[utopia]

Its probably not of much help Gazza, but if there are any bushes, spacers etc that you can't get hold of, I'd be happy to turn some replacements for you on my lathe.
Similarly, if I can help in modifying a different bracket.
Just shout.

[Dirty]

Really Duke, please stop posting bike engineering porn, you are gonna bankrupt me! :)

[Darren69]

Yes Duke, nice link. I want one for my S4. Well if the powder coating place has any sense then they would check which other orders were done that day that could have been sent the part. And fingers crossed they haven't just binned it? Of all the parts to lose, the one that was specific to your bike and almost impossible to find s/hand!

[Mr Gazza]

Whoa..my quirky little part is generating a lot of interest..!

Darren ..Yes that 888 part is similar to the top hats I mentioned, there are two of them. not stepped as the 888 one, but one on each side of the hanger, so that the axle clamps the top hats solid and then the hanger pivots on the top hats....I'm 80% sure that the hanger had a bush that ran on the top hats.....(eek bit pricey for a stepped bush/tophat whatever..!!!)

Dukedesmo... Yes that is the standard one alright. The floating "S" version that I seek is like that, but minus the slotted arm going out to the right in your picture, and so looks more like a true triangle. The top hole is bigger (22mm) and contains a bush (i think).

And thanks Utopia for the offer of help..I hope it doesn't come to that..!

The powder coaters was built up into a magnificent reputation by the Father, who now operates from different premises.
I first contacted the father, but he was in the thoes of moving premises yet again, to accomodate both branches of the company under one roof. So he directed me to his Son for the coating, who runs the original workshops....Now the Son has a different attitude, and seems quite casual about losing a vital part of my bike....He sounds confident that the bit is still there somewhere, but does not display any particular urgency in finding it.
I have informed him that I can get a new replacement from Italy (Via Moto Rapido) which is £60 before VAT and postage. He seemed to think that would be a last resort.!!

Anyway the Father is a good sort, and if I can't get satisfaction I am sure a quiet word with him will get things moving....It's such a shame as he really has got a fantastic reputation in the powder coating world...Maybe that's why he is moving the boy back in under the same roof.??? It doesn't take very long at all to lose a good reputation..!!

If any one can find one though I would still be very grateful as they will be coating agian on Friday, and it would be an end to it all if I could take a hanger down there and get it over with..

[popelli]

anybody got a pic of the original part out of a parts manual ?

[Mr Gazza]

Popelli...It's just like the picture Dukedesmo posted above...only minus the torque arm.

[popelli]

ok can't help him then

unless he is handy with a hack saw to remove the torque arm

[Mr Gazza]

No worries buddy....Thanks for trying...:mand:

[slob]

...please stop posting bike engineering porn, you are gonna bankrupt me...

dammit! ditto

[crust]

Wanted some pieces of milled billet aluminium for a Monster...

hmmm

Paging Max, Max to this thread, please, paging Max, Clean up on thread 48705

[pompone]

I actually have the factory drawing specs for the whole setup Simon, maybe worth see if we can put together a group buy then.. ;)

[Mr Gazza]

That billet set up appears to mimic the geometry of the Ducati one very closely.
I wonder if it uses the standard Brembo caliper?

The smaller of the triangular parts is the forward mount for the torque rod rose joint. This is retained by the lower footrest hanger shoulder bolts, between the engine and footrest hangers. There appear to be bolts provided for use if rear sets are fitted.

There must also be something that they are not showing us, as there must be some means of allowing the caliper support to pivot freely on the axle. My Joiners squint tells me that the hole looks about 17mm ish, which would be right for the axle, but it aint going to work unless there is some sort of bush and top hat arrangement.

I think it would be a worthwhile mod on two levels, the first being just the cool looks.
But mine does give a very pleasant feel when the brake is used. There is no percievable sink or rise, even with a good hard dab of the brake.
Although it's certainly not my habit to do so, I did find myself dragging the back brake round a downhill corner that i had gone into a little too quickly on one occasion this Summer.
The bike remained very stable as always with some useful reduction of velocity, but what I noticed was that the suspension was still working as normal on the bumpy lane, and therefore tyre contact was being maintained.
I can't really describe it, but I'm sure you know what I mean if I say that a non floating set up will usually give a bit of a "stiffening up" feeling in such circumtances.?

The floating set up will benifit more aggresive riders than myself (most riders..:confused:), but I feel that I am enjoying a safety benift any way, and a reasuring feel at the least.

It would be well worth some further thought Pompone...:biggrin:

[Dukedesmo]

That billet set up appears to mimic the geometry of the Ducati one very closely.
I wonder if it uses the standard Brembo caliper?

The smaller of the triangular parts is the forward mount for the torque rod rose joint. This is retained by the lower footrest hanger shoulder bolts, between the engine and footrest hangers. There appear to be bolts provided for use if rear sets are fitted.

There must also be something that they are not showing us, as there must be some means of allowing the caliper support to pivot freely on the axle. My Joiners squint tells me that the hole looks about 17mm ish, which would be right for the axle, but it aint going to work unless there is some sort of bush and top hat arrangement.



And here it is fitted with standard caliper;

http://www.ducati.ms/gallery/files/9/3/7/0/img_0642a.jpg

It is indeed 17mm and there is a bush so that it rotates and also 'floats' giving the same effect as would a floating disc. The torque arm bolts to the front caliper retaining bolt. :thumbsup:

[Dirty]

And here it is fitted with standard caliper;

http://www.ducati.ms/gallery/files/9/3/7/0/img_0642a.jpg

It is indeed 17mm and there is a bush so that it rotates and also 'floats' giving the same effect as would a floating disc. The torque arm bolts to the front caliper retaining bolt. :thumbsup:

Drool :o
.

[Mr Gazza]

Yes, I have had a proper look at the billet support and now I can see that the bushing arrangement is assembled onto the support already. I was looking at it as if the whole lot was from the same billet, which would mean that it would be nipped up by the axle and not work.
That's slightly better than Ducatis tophat arrangement in a way, as there are less parts to loose when the wheel is dropped out, and less parts to thread onto the spindle when it goes back in too..
I will have to check to see if there is any lateral float on mine when I get it all back again, it never occured to me that it might float in and out too.

It strikes me that it could be possible to do this floating conversion with Ducati parts for a lot less than the Japanese billet one. I will price it all up when Moto Rapido open up again, and let you know.

[crust]

There used to be a kit available as a Ducati Performance upgrade.

[Dukedesmo]

That's slightly better than Ducatis tophat arrangement in a way, as there are less parts to loose when the wheel is dropped out, and less parts to thread onto the spindle when it goes back in too..


The whole brake caliper mount assembly stays in one piece so there is nothing that 'falls' out when the wheel is removed/fitted (other than the sprocket-side tapered spacer).