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bobdcamp Brick Rider
Joined: 30 Nov 2012 Posts: 47 Location: Durham,NY
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Posted: Fri Sep 28, 2018 10:22 am Post subject: K1100RS rear master |
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I own a 93 K1100RS. My rear master froze up. I called the dealer to
order a rebuild kit. The dealer told me I have to buy a new master cyl.
as kits are not available for 12mm master cyl. rear's Does anyone know
of a kit that would work. I know of a shop in NY that can bore out a master
cyl. and sleeve it with a brass sleeve. I did it for my 74 R90S 10 years ago.
Thank you Bob D _________________ 74,R90S
81,R100RS
86,R80RT
94,K1100RS
96,K1100R
97,K1100LT Hi-Line |
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Flying Duck PsyKotic Waterfowl
Joined: 27 Jan 2005 Posts: 10082 Location: Bumf***, WA
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Posted: Fri Sep 28, 2018 1:45 pm Post subject: |
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Did you overtighten the pedal adjustment?
What can happen is that if you have the brake pedal adjusted too tightly when you apply the brake it can push the piston back far/hard enough to get stuck on the set screw.
Have you tried loosening the set screw? (The tiny screw in the side of the master.)
Figure out WHY it locked up before spending money. _________________ 93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE
Last edited by Flying Duck on Sat Sep 29, 2018 7:34 am; edited 2 times in total |
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N41EF Flying Brick Rider
Joined: 23 Mar 2014 Posts: 406 Location: Aiken, SC
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Posted: Fri Sep 28, 2018 2:23 pm Post subject: |
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Beemer Boneyard sells a rebuild kit. _________________ 2014 R1200RT Water Cooled
2001 R1100S Light
1993 K1100LT. Nissan Ice Blue.(Gone) |
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Scott_Anderson Site Admin
Joined: 05 Sep 2006 Posts: 3117 Location: Central Iowa, USA
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Posted: Fri Sep 28, 2018 7:36 pm Post subject: |
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N41EF wrote: | Beemer Boneyard sells a rebuild kit. |
Not anymore...
Complete MC assemblies are also sold out and not available.
Here's the reason:
DUE TO THE RECENT LAWSUIT BROUGHT BY BMW AGAINST MAGURA, ONCE OUR CURRENT STOCK OF MAGURA PRODUCTS IS GONE WE WILL NO LONGER BE ABLE TO SELL ANY BMW SPECIFIC MAGURA PRODUCTS. _________________ Ride safe.
1995 K1100LT 0302044
1997 R1100RT ZC62149
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.) |
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Al. Flying Brick Rider
Joined: 28 Oct 2005 Posts: 383 Location: West of Ireland
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Posted: Sat Sep 29, 2018 2:36 pm Post subject: |
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Mine froze up a few yrs ago.
It was oxidation of alloy.
As far as I recall I just cleaned it out and new seals.
Motorworks in UK
Otherwise Moto Bins or Sherlocks _________________ 1994 K1100 LTSE + Blackbird |
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Jim Site Admin
Joined: 17 May 2003 Posts: 3840 Location: WHERETHEFUNNEVERENDS
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Posted: Sat Sep 29, 2018 9:43 pm Post subject: |
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Bob - if you have to buy a new cylinder (and you might), be sure to check prices at Motorworks. https://www.motorworks.co.uk/vlive/Shop/Parts.php?T=5&NU=15&M=40&Ct=IA&SbCt=BA_15_40_IA_45
Right now the rear master cylinder is about $177 plus shipping from Motorworks (not an exorbitant price). At Max BMW it's $262 (an extortionist price). Also note that Motorworks has a repair kit for that master cylinder - about 71 USD.
Parts are often cheaper from the UK, shipping isn't that much, and Motorworks ships pretty fast. I've bought a lot of stuff from them. _________________ Jim
1997 K1100LTSE 94,000 - has gremlins!
1995 R100RT Classic 16,650 crashed - repairing
1992 K75RTP 46,000
1992 R100R 24,000 - FOR SALE
"We shall not all die, but we shall all be changed." |
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leonp24
Joined: 23 Aug 2015 Posts: 15 Location: Seattle, WA
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Posted: Sat Sep 29, 2018 10:07 pm Post subject: |
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Jim wrote: | Bob - if you have to buy a new cylinder (and you might), be sure to check prices at Motorworks. https://www.motorworks.co.uk/vlive/Shop/Parts.php?T=5&NU=15&M=40&Ct=IA&SbCt=BA_15_40_IA_45
Right now the rear master cylinder is about $177 plus shipping from Motorworks (not an exorbitant price). At Max BMW it's $262 (an extortionist price). Also note that Motorworks has a repair kit for that master cylinder - about 71 USD.
Parts are often cheaper from the UK, shipping isn't that much, and Motorworks ships pretty fast. I've bought a lot of stuff from them. |
Agreed! I recently purchased the Motorworks repair kit for my rear master. Also picked up some "0000 steel wool" (per SmithDuck) to "lightly" clean the bore before putting it back together. It's now the end of the season and no issues so far. _________________ 1994 K1100RS - Mystic |
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Al. Flying Brick Rider
Joined: 28 Oct 2005 Posts: 383 Location: West of Ireland
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PaulAMcNamara
Joined: 25 Oct 2018 Posts: 2 Location: Australia
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Posted: Thu Oct 25, 2018 9:31 pm Post subject: |
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Gentlemen, as part of a rebuild of mu '93 RS, I too repaired the rear brake master cylinder, after seeing the price of genuine BMW parts, I measured the seals and purchased identical dimension parts from a local parts supplier. From memory they are Ford parts. Seals were less than A$1.00 each, postage from the interstate warehouse was A$14.00. Been running now for over 12 months without issue. _________________ K Bikes and Old Utes |
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garynali Mad Brick Rider
Joined: 17 Apr 2010 Posts: 79 Location: Hervey Bay, Australia
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Posted: Sun Oct 28, 2018 4:20 am Post subject: |
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Good work Paul ,more than one way to skin that cat. Have done my rear master, steel wool and new seals. The front master was problematic for seals as it had previously been sleeved. A visit to the brake guru in Gympie fixed that for five bucks, standard imperial dimension bucket.
Gary C
Hervey Bay
93 K1100RS
Vstrom 1000 |
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PaulAMcNamara
Joined: 25 Oct 2018 Posts: 2 Location: Australia
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Posted: Sun Oct 28, 2018 7:01 pm Post subject: RS top box latch |
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Gentlemen,
Has anybody sourced an alternate to the OEM top box latch for the RS, I don't necessarily need a key however will purchase the best available. _________________ K Bikes and Old Utes |
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