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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: TommyT on October 24, 2019, 04:17:33 PM

Title: front brake master cylinder seals
Post by: TommyT on October 24, 2019, 04:17:33 PM
i can not find a place that  only sells the 13mm seals for the front brakes master cylinder, i only see expensive rebuild kits. is there another bike that uses the same seals?
Title: Re: front brake master cylinder seals
Post by: Laitch on October 24, 2019, 04:43:06 PM
If there is, somebody is sure to let you know.

What's the problem and what have you done to correct it?
Title: Re: front brake master cylinder seals
Post by: Martin on October 24, 2019, 04:58:42 PM
Try a friendly brake specialist. Most can't be bothered, however there are still some that seem to be prepared to help. I've got a local guy who is pretty helpful. We also have a local guy who re-sleeves cylinders and calipers with imperial sized stainless. Last time I checked it was $200.00 Au for the front master cylinder re- sleeve  and new brass piston, and once done replacement cups were $10.00 Au. He guarantees and tests all work, and will ship overseas. I've gotten rear master cylinder boots off him for $4.00 Au.
Regards Martin.
Title: Re: front brake master cylinder seals
Post by: TommyT on October 24, 2019, 05:00:16 PM
Quote from: Laitch on October 24, 2019, 04:43:06 PM
If there is, somebody is sure to let you know.

What's the problem and what have you done to correct it?
well, i have a project bike, a 1991 K100 RS with ABS that sat a long time. the front brake master cylinder was froozen. after 4 days of trying to get the piston out of the bore, i succeeded but found that one of the seals was shot but the rest of the internal parts look good and the cylinder bore cleaned up well with a 12 gal shotgun bore brush. i am trying to avoid spending over $70 for a rebuild kit when one seal should do it.
Title: Re: front brake master cylinder seals
Post by: Martin on October 24, 2019, 05:05:10 PM
Try this guy, he pretty helpful.
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Title: Re: front brake master cylinder seals
Post by: TommyT on October 24, 2019, 05:18:40 PM
Quote from: Martin on October 24, 2019, 05:05:10 PM
Try this guy, he pretty helpful.

* Boots and cups supply[1].jpg (55.42 kB . 768x576 - viewed 394 times)
okay thanks, but i have to wonder if i order something what shipping will cost. i guess i can find out. is it about a 24 hour time zone difference from new york?
Title: Re: front brake master cylinder seals
Post by: Laitch on October 24, 2019, 05:19:53 PM
Post a request in the FS~WTB~WTT section of the Motobrick Marketplace. Somebody might have a working used part. I recently repaired one with a used piston. I polished the bore thoroughly using an extra fine metal polishing pad like a ScotchBrite. I haven't seen alternatives for oem pistons and seals posted yet.