Rear brake master cylinder information, raptor 1000 and 650

[Bear of Little Brain]

I'm in the process of attending to the leaking rear brake master cylinder on my year 2000 Raptor 1000. This is just to put down some information that I've garnered for the UK.

From some previous post, I was led me off to the Suzuki forum and thence to a couple of US suppliers:
http://www.oppracing.com/product_displa ... -push-rod/
http://www.2wheelpros.com/brembo-oe-rea ... 58147.html
These show that the part number for the Raptor 650's and 1000's is 10477653.
As can be seen from the images on those pages, the inlet stub projects directly out.
However, in the UK, Brembo motorcycle parts are distributed by Mode Performance who, in turn, have a number of authorised dealers.
http://www.modeperformance.co.uk/authorized-dealers
Ian Edwards is the man at Mode Performance (it is his company), but he is almost impossible to contact. It's not really his fault: he specialises in their performance brake systems and travels the racing circuit worldwide. When I rang him on Friday, his PA/colleague told me that he had said that the part number that I needed was 10477610. So off I went to speak to a couple of the authorised distributors. Crescent Motorcycles told me about the set up at Mode, then said that I should speak to Bike Torque Racing, since they deal more with non-performance, i.e., street, bikes.
Over on the Bike Torque Racing site they have this for 10477610:
http://www.biketorqueracing.co.uk/results/10477610.
This shows the inlet stub as being right-angled.
It was after speaking to Paul at Bike Torque Racing that I went to look at my bike to see if this could be used instead. (Paul also said that "they" - the rear brake master cylinders – all had the right-angled inlet.) I came to the conclusion that trying to shoehorn things using the right-angled inlet was far from satisfactory because there isn't much room for manoeuvring things around down there.
To cut a long story short, and being rather perplexed, I finally got to speak to Ian at Mode. I already knew that there was no stock of the original, 'proper' part, 10477653 at Bike Torque. Neither was there any at Mode (the main distributor). The lead time from Brembo themselves was unknown, but would be weeks, minimum.
However, after explaining the problem to Ian, he said that the right-angled inlet just pulled out and could be easily replaced with the short stub which, it turns out, has a part number, 110312710 (it is actually a stub and grommet combination). Given the low retail price of the item and my reticence in wanting to give anyone my credit card details over the phone he said he'd send me the stub, gratis. (Although I'm sure Ian is utterly trustworthy, it is impossible to know just how secure CC information is once it leaves his keyboard.)

Although it is likely that my leak is solely due to that inlet stub and its rubber seal having become defective I'm going to replace the master cylinder anyway. It is fourteen years old, and the hassle of having to do the job twice if it turns out I'm wrong and that there is actually leakage back from the cylinder chamber has persuaded me to just fork over the extra.

(Incidentally, I went back to Bike Torque to tell them about this solution. The person that I spoke to said that they did, actually, stock the straight stub, but only knew it as a part for front brake systems.)

Summary:
According to the US sites above, the correct Brembo part number for the rear brake master cylinder is 10477653.
10477653 may not be readily available in the UK. Back-ordering on Brembo has an unknown lead time.

A suitable solution is:
Use rear brake master cylinder 10477610 and pull out the right-angled inlet and replace it with the stub and sealing rubber combination, 110312710

Currently, Bike Torque Racing have the rear brake master cylinder 10477610 at £42.94
http://www.biketorqueracing.co.uk/?i=Se ... s=10477610
and the straight stub and grommet 110312710 at £3.79
http://www.biketorqueracing.co.uk/?i=Se ... =110312710
If you need the feed tube and clips, it's "hosekit" at £6.50
http://www.biketorqueracing.co.uk/?i=Se ... &s=hosekit

I'll update this as soon as I've swapped over the stubs, to confirm that everything is as I said.

[ozzraptor]

Thats great info there, i am sure at some stage i will be needing one but hopefully not for awhile. In saying that its always good to have a spare of this type in case parts get harder to find especially for these bikes.

[Spyke]

Ah, thanks for the write-up Bear, that's been very helpful - I've been looking at replacing my m/c hoses as a preventative measure, given her age, but have been struggling to find a suitable replacement. Knowing that it's "pipe" and not "tube" or "hose" has made all the difference and I found http://www.ebay.com.au/itm/140892788374 which is exactly what I'm looking for, with super-cheap postage to the colonies!

[Bear of Little Brain]

Update:
Parts arrived a while ago. I've attached a picture showing the cylinder, the straight stub and its grommet, and the 0.5m of tube and the two tube clips.

P1040632.jpg (109.5 KiB) Viewed 4804 times

Removing the right-angled inlet wasn't too difficult once I'd figured out that I needed some leverage and to avoid damaging the metal face on the cylinder itself. An after-the-fact reconstruction image shows the idea: sturdy long-nosed pliers, an old wooden-handled bradawl and some firm pressure. However, this only pulled the plastic inlet tube through the retaining grommet. A little more faffing with the bradawl (or was it the pliers?) removed the grommet `- again taking care not to touch, scratch or damage the metal body.

P1040639.jpg (26.47 KiB) Viewed 4804 times

The last image shows the straight stub in place. The stub had to be inserted into the grommet before pushing them both in as an assembly. As I recall, there was some lubricant left on the cylinder inlet wall from the previous grommet, which helped. Otherwise I would have tried a little brake fluid there , which I assume is what had been used before.

P1040641.jpg (25.51 KiB) Viewed 4804 times

I pushed that stub in using the ends of the long-nosed pliers bearing onto the shoulder of the stub, not the grommet. I was also careful not to apply clamping pressure on the handles of the pliers, which could have damaged the hose retaining ring on the stub. In retrospect, maybe I should have tried something like a small open-ended spanner coming in sideways over the shoulder and pushed down on that. I was probably lucky that the plier nose tips didn't slip…

[Spyke]

Thanks Bear, great write up!

That elbow joint you've taken off looks similar to the ones they were talking about for clutch reservoirs recently, so I would have been worrying about internal circlips, thanks for the great pics.

[ozzraptor]

i dont think brembo use those internal clips, they just sit there

[Spyke]

i dont think brembo use those internal clips, they just sit there

Oh gosh - be careful, Bear!

[ozzraptor]

i dont think brembo use those internal clips, they just sit there

Oh gosh - be careful, Bear!

At least thats what i heard because you cant fit those billet type direct fit reservoirs like my brake reservoir to the brembo .

[Spyke]

i dont think brembo use those internal clips, they just sit there

Oh gosh - be careful, Bear!

At least thats what i heard because you cant fit those billet type direct fit reservoirs like my brake reservoir to the brembo .

OK I might be getting confused here - nothing new, really!

My mechanic changed both of my reservoirs over, and I didn't watch what he did, but as the reservoir to master cylinder "pipe" is not under pressure there should be no need for a retaining circlip, reading this thread more carefully, this is the "inlet stub" of the master cylinder. However the master cylinder to calliper "braided hose" on the outlet stub WILL be under pressure so would hopefully get the banjo bolt rather than just "sitting there"?!

[Bear of Little Brain]

Thanks Bear, great write up!

That elbow joint you've taken off looks similar to the ones they were talking about for clutch reservoirs recently, so I would have been worrying about internal circlips, thanks for the great pics.

Aw. Shucks. Thank you.

Ian Edwards, mentioned in the initial post, is the Brembo man in the UK, as far as I can determine. He was the one that told me that these inlet stubs are push-fits. From the horses mouth, so to speak. Otherwise I would probably not have believed it. Suspicious? Moi?

MissPiggy.jpg (8.21 KiB) Viewed 4780 times

If I recall correctly, at some point, someone at Bike Torque said that they are the same straight stubs as are used on a front brake feed (or was it a clutch feed?) and that was why they stocked them. Using them for the rear brake reservoir was news to him. Your trivia for the day.

I may even get around to fitting it all over the weekend…