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MOTOBRICK MARKETPLACE => FS WTB WTT ~ Bikes ~ Parts ~ Gear => Topic started by: Atabeach on October 27, 2025, 09:39:48 PM

Title: Parts needed for 85 Barn find
Post by: Atabeach on October 27, 2025, 09:39:48 PM

Low mount rear master reservoir ,see photo, front brake lever.

Title: Re: Parts needed for 85 Barn find
Post by: Laitch on October 27, 2025, 11:34:34 PM

Replace that relic with a frame-mounted reservoir that won't degrade from sunlight. The new style is held by a frame-mounted bracket behind the right-side battery cover away from sunlight. You'll either find a bracket, fabricate a bracket or zip-tie it securely into place. The reservoir and hose in the photo is now being offered at beemerboneyard (https://www.beemerboneyard.com/34312314082.html). There are similar designs elsewhere. The cap should come with a rubber bellows that extends into the reservoir, like your old one had.
(https://motobrick.com/gallery/4/1601-271025232237.png)

Title: Re: Parts needed for 85 Barn find
Post by: frankenduck on October 28, 2025, 10:01:27 PM

The newer style reservoir does not mount to the frame. It mounts to the relay box.

Title: Re: Parts needed for 85 Barn find
Post by: Atabeach on October 28, 2025, 10:08:42 PM

Ok sooo I need the whole shebang anyway…Does the rear cylinder differ in compatibility? It is stamped 13mm and is beyond repair. 1985…to what year? TIA ..also the bike has no switches, not even a hazard!

Title: Re: Parts needed for 85 Barn find
Post by: Laitch on October 29, 2025, 09:54:55 AM

Quote from: frankenduck on October 28, 2025, 10:01:27 PM

The newer style reservoir does not mount to the frame. It mounts to the relay box.

That's the case if the original style holder can be obtained and certainly would make installation easier. 112350 

Quote from: Atabeach on October 28, 2025, 10:08:42 PM

Ok sooo I need the whole shebang anyway…Does the rear cylinder differ in compatibility? It is stamped 13mm and is beyond repair. 1985…to what year? TIA ..also the bike has no switches, not even a hazard!

Go to this epic thread started by  (https://motobrick.com/index.php?topic=9364.0)Young Engineer (https://motobrick.com/index.php?topic=9364.0) to read about a successful cheap Chinese substitute for that master cylinder at a fraction of the price of OEM that several members here are using. Mighty Gryphon and others discuss in detail how it is accomplished.

Title: Re: Parts needed for 85 Barn find
Post by: Atabeach on November 02, 2025, 02:17:14 PM

Thanks Laitch…I forgot that mod! I’m attempting it now…
Ok fellas , I have acquired a hazard switch, if anyone knows what wires to tap into it would be greatly appreciated. This an ‘85 and I do not see a service clip… Also…MOTOBINS UK has an aftermarket heated grip kit $ 130. Anyone have success with this Item?  Otherwise $200 plus switch for BMW