front brake master cylinder cover leaking

[sheridanredneck]

my front master cylinder cover leaks a lil round the edges, do they make a replacement cover n gasket or can i get a reasonably priced replacement master cylinder for my '81 xs 1100?

[TopCatGr58]

Bike Bandit shows the parts still available on this page:
http://www.bikebandit.com/houseofmot...1100sh/o/m8246

Their parts 2,3,4:
2: CAP,RESERVOIR
10787-001 Enter 0-99 $39.70
3: BUSH,DIAPHRAGM
10791-001 Enter 0-99 $13.98
4: DIAPHRAGM RESERVOR
10789-001 Enter 0-99 $17.12

That being said, you can get a replacement NEW master cylinder from several sources for about $80.00....ie. Partsnmore.com or MikesXS.net !

Several folks have gotten the new MC's and have been happy with them.
Just be sure to to get the larger bore ones for dual caliper systems!
T.C.

[rpgoerlich]

Hey Shannon, the cap, bushing and diaphragm are still available.

2 SKU: 1J3-25852-01-00 CAP, RESERVOIR 1 $28.58
3 SKU: 1J3-25855-01-00 BUSH, DIAPHRAGM 1 $10.07
4 SKU: 1J3-25854-01-00 DIAPHRAGM RESERVOR 1 $12.33

If you cant find one locally, online parts stores like:

http://www.powersedge.com
http://www.powersportspro.com
http://www.bikebandit.com

I'm sure there are a few more.

[fabricgator]

Hey Guys,

What is the seal from the plastic reservoir to the metal casting on the stock front brake master... I did not see it on the IPC from the second post link (illustrated parts catalog). I seem to remember that seeping and I used RTV silicon (only lasts for a season or so).

Is it an O ring or a square cut seal.... a gasket? I don't think there is one in the standard rebuild kit.

Are they available? Any good sourcing?

Thanks, Kurt

[motoman]

Cap on my front has same issue....very slight as it is just a bit warped(slight arc across center), will watch for NOS one, as it just has an occassional damp at cap sealing seam. Nice to know the source if it becomes an issue!

[fabricgator]

I recently saw NOS on Ebay for about thirty some odd dollars.... I would have liked to have it, but......

[DGXSER]

on my SH models, the reservior mounts to the MC by a round section that fits down into the round metal part of the MC. There is a groove in the plastic reservior where it drops into the MC that takes an o-ring.

[sheridanredneck]

thanks so much guys! every time i need help, ya'll r so willing to help, thank u n keep up this great site!

[SFerinTEXAS]

mikesxs

MIKESXS Part #08-7000 $34

[fabricgator]

on my SH models, the reservior mounts to the MC by a round section that fits down into the round metal part of the MC. There is a groove in the plastic reservior where it drops into the MC that takes an o-ring.

Yeah, the o ring..... That's what I need! Any idea where to get one? Size? Part number? If I were to source an o ring on the street, is there any particular type of material that should order that holds up to brake fluid?

I don't see that o ring on any of the parts manual's....

[bikerphil]

There is no parts listing for that O-ring. Best bet is to take the old one to a hydraulic shop and have them match it up. If you do find one, pls. let us know the size for future reference.