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Mechanicsn
Posted on Thursday, May 12, 2011 - 05:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My rear master cylinder is sticking on my 08 R, has anyone upgraded their rear master cylinder to a Brembo? I found the Brembo part number for an upgraded caliper but can't seem to find anything for the master. TIA.
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Zac4mac
Posted on Thursday, May 12, 2011 - 10:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've had no trouble like that but have read of a few that have.
I think Jim Dugger, who races, has gone to Brembos on the rear and on the front M/C.
Also one of the Brits, John?

Check your adjustments and make sure it's bedded.
If you run a stock exhaust, try dragging the brake a little when you start out.
The OEM exhaust tends to deposit water and soot on the disc.

Hope some of this helps...
My rear brake works just fine for my needs.

One thing I noticed early on - there is a boss on the clutch cover that my foot kept hitting when I wanted brake.
I extended the peg with a 1/2" spacer and solved the problem.

Z
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Boogiman1981
Posted on Thursday, May 12, 2011 - 10:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

mine went haywire on my 08R had harley replace it all under warranty and it's been fine since. the replacement feels so much better than the OE one ever did
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Dirty_john
Posted on Friday, May 13, 2011 - 02:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yep I fitted a Brembo rear master cylinder, it has the same mounting hole spacing and top exit side entry as the Buell OEM unit, make sure you buy a banjo bolt from Brembo as the threads are not the same, the Brembo unit also can be purchased with their link rod. A good upgrade over the OEM rear brake caliper is a Brembo Goldline unit but the rear brake hose again needs a Brembo banjo bolt at the caliper end.
I have also fitted a Brembo RCS radial master cylinder to the front brake with very good results - I am at work at the moment but will try to get the Brembo part numbers and post next week.
The next mod is to fit a return spring to the rear brake pedal.

Just checked my PC - The Brembo rear master cylinder was part number 10477660 from Bike Torque Racing here in the UK, not sure if that is a Brembo part number or their in house number.



(Message edited by Dirty_john on May 13, 2011)
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Jdugger
Posted on Friday, May 13, 2011 - 08:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

> I think Jim Dugger, who races, has gone to Brembos on the rear and on the front M/C.

I replaced the front MC, but my rear brake is totally bone stock. I'd like to upgrade the rear caliper to reduce the weight, but haven't done it yet.

I did have a rear MC seize as well. I didn't notice it, actually, but the dealer I had do a valve job on my stock/B bike did when they took it for a test ride. It was replaced under warranty, and I've not touched it since : )
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Mechanicsn
Posted on Friday, May 13, 2011 - 08:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks for the help guys, that party number from Dirty John is a Brembo number. I found the caliper part number via his earlier post. The brake has worked fine for me so far, bedded in well and worked great. I can feel the cylinder starting to stick, so I plan to swap it before it goes south.
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Mechanicsn
Posted on Tuesday, May 17, 2011 - 12:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Brembo master, caliper, and banjo bolts ordered along with a spare set of rear pads. Now to wait for parts.
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Sprintst
Posted on Tuesday, May 17, 2011 - 02:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

These have rear brakes?
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Duphuckincati
Posted on Tuesday, May 17, 2011 - 04:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Brakes are for girls!
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Dirty_john
Posted on Wednesday, May 18, 2011 - 02:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"Brakes are not for girls", what a stupid thing to say, sounds like someone is not riding hard enough and haven't some people learnt to use the rear brake to adjust cornering lines?
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Blake
Posted on Wednesday, May 18, 2011 - 04:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It was a joke. Lighten up Francis. Geez!

>>> "use the rear brake to adjust cornering lines"

Really unwise. Try using the handlebars.
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Dirty_john
Posted on Wednesday, May 18, 2011 - 01:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I use whatever works - whether on a motocross bike or the track
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Mountainstorm
Posted on Friday, May 20, 2011 - 03:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Good one Blake.
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Mechanicsn
Posted on Sunday, May 22, 2011 - 11:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I got my brake parts in on Saturday, the caliper looks beautiful, but the master is not so simple. The master cylinder has a pushrod cup, and I need one set up for a clevis. I'm still researching my options on this, will update as I go.
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Dirty_john
Posted on Monday, May 23, 2011 - 08:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Suggest you get the Brembo link rod for the specific master cylinder, on my 09 1125R this was a direct replacement for the OEM unit
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Afhans
Posted on Thursday, June 16, 2011 - 01:48 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My master cylinder just went out yesterday on my '08 at about 7K miles. Still under warranty so I'm just letting H-D replace it. However, if I have problems again, after the warranty, I'll be checking out Brembo. Or I'm I reading Dirty Johns post right, that H-D might be replacing it w/a Brembo as OEM?
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