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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: jacksdad1963 on June 14, 2014, 03:52:30 PM

Title: Front brake caliper O ring?
Post by: jacksdad1963 on June 14, 2014, 03:52:30 PM

I've stripped the front brake on my (spares bike) K1100LT: Finally got the 2 halves of the caliper body apart...not easy!
I now need the rubber O ring that seals the fluid channel, for both calipers, but cannot find a part number. I need a pair of the O ring, or even a repair kit, wouldn't do any harm, as long as its cheap!  :neener:

Title: Re: Front brake caliper O ring?
Post by: Inge K. on June 14, 2014, 04:12:38 PM

Part #23290 at Motobins, £1,50 each.

Title: Re: Front brake caliper O ring?
Post by: tg4360 on June 15, 2014, 11:04:10 AM

If it leaks when you put it back together (look for fluid at the seams while you squeeze the lever....) get a piece of plate glass and some fine wet or dry paper.  Wet it and run the mating surfaces over it in a figure eight pattern.

I had one that refused to seal till I did this.  It seems that just bolting them together will distort them enough that they might need this treatment.

Title: Re: Front brake caliper O ring?
Post by: jacksdad1963 on June 15, 2014, 06:58:53 PM

I'll try cleaning up the faces as you suggest, and order the o rings as well!
Thanks guys! :2thumbup:

Title: Re: Front brake caliper O ring?
Post by: Damun on June 28, 2014, 07:46:49 PM

If you are in the USA, Yoyodyne carries pistons & seals for all sizes of Brembos.

http://www.yoyodyneti.com/Category.aspx?CategoryID=3017 (http://www.yoyodyneti.com/Category.aspx?CategoryID=3017)

Title: Re: Front brake caliper O ring?
Post by: tg4360 on June 30, 2014, 12:37:16 PM

Man thanks for that link Damun.

Last time I needed o-rings I had to get them from Motobins in the UK.

TG