The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: dostoy320 on July 15, 2026, 08:23:56 AM

Title: Magura 15mm Master Cylinder Reservoir Retaining Screw
Post by: dostoy320 on July 15, 2026, 08:23:56 AM

Hello,

That small screw that retains the plastic reservoir body from the underside of the master cylinder is missing on the R65LS I just purchased. Does anyone know the correct screw dimensions? It isn't labeled on any of the parts fiches I've found.

I'm assuming something very short and course threaded.

Title: Re: Magura 15mm Master Cylinder Reservoir Retaining Screw
Post by: Tiedie on July 15, 2026, 11:14:17 AM

https://shop.maxbmw.com/fiche/DiagramsMain.aspx?vid=51899&rnd=10232024
It's part # 222 here at Max. Either give them a call or call EME and they should be able to get 1 out to you. I don't think I can size it on the spare Master cylinder I have. I can look but it might take a bit to get back to you.

Title: Re: Magura 15mm Master Cylinder Reservoir Retaining Screw
Post by: dostoy320 on July 15, 2026, 03:10:34 PM

Thank you! The image of the screw against a ruler at the link you provided is likely enough for me to find the equivalent at the local hardware store.

I do appreciate it!

Title: Re: Magura 15mm Master Cylinder Reservoir Retaining Screw
Post by: Tiedie on July 15, 2026, 04:51:27 PM

 :thumbsup: I have a 84 LS and rebuilt the front brakes I do have the master cylinder afew months ago and I got what you need. I can send it to you. Or if you need the the whole reservoir pictured. We can work something out.

Title: Re: Magura 15mm Master Cylinder Reservoir Retaining Screw
Post by: dostoy320 on July 16, 2026, 08:21:38 AM

Thank you for the offer Tiedie! Let me see what I can scrounge together locally. My hope is that the rest of my master cylinder components are in good enough shape to be reused.

Title: Re: Magura 15mm Master Cylinder Reservoir Retaining Screw
Post by: Tiedie on July 16, 2026, 11:51:35 AM

Quote from: dostoy320 on July 16, 2026, 08:21:38 AM

Thank you for the offer Tiedie! Let me see what I can scrounge together locally. My hope is that the rest of my master cylinder components are in good enough shape to be reused.

No problem. What ever you decide the brakes can be rebuilt all the way to the master to the calipers. Lines and splitter behind the dash.

Title: Re: Magura 15mm Master Cylinder Reservoir Retaining Screw
Post by: dogshome on July 16, 2026, 02:25:19 PM

Looks like an M3x10mm self tapping screw.https://www.ebay.co.uk/itm/358480511492?_ul=GB&rb_itemId=358480511492&rb_pgeo=GB&var=626674479201&ff=11&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5339059258&toolid=10044&customid=Cj0KCQjwguLSBhDLARIsAH-yPrHFz_8klqrFH-owJRCMFiC4fgUEQGhZBy3Yw_3s4qxSIoXQ_PL1zaQaArbzEALw_wcB&gclid=Cj0KCQjwguLSBhDLARIsAH-yPrHFz_8klqrFH-owJRCMFiC4fgUEQGhZBy3Yw_3s4qxSIoXQ_PL1zaQaArbzEALw_wcB&wbraid=CkAKCAjw39zSBhAeEjAAXSXt-shUI6R9x48bJmJs0aWgJGlturueRTyKYP3xwCV8c7F1h3pcczORmQAXoRwaAhVW&gbraid=0AAAAADA7Q_K6tTXTAzO3C5tkYtnevtI50&adtype=pla&loc_physical_ms=1006944&loc_interest_ms=&gad_source=1&gad_campaignid=20506529270&gbraid=0AAAAADA7Q_K6tTXTAzO3C5tkYtnevtI50 (https://www.ebay.co.uk/itm/358480511492?_ul=GB&rb_itemId=358480511492&rb_pgeo=GB&var=626674479201&ff=11&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5339059258&toolid=10044&customid=Cj0KCQjwguLSBhDLARIsAH-yPrHFz_8klqrFH-owJRCMFiC4fgUEQGhZBy3Yw_3s4qxSIoXQ_PL1zaQaArbzEALw_wcB&gclid=Cj0KCQjwguLSBhDLARIsAH-yPrHFz_8klqrFH-owJRCMFiC4fgUEQGhZBy3Yw_3s4qxSIoXQ_PL1zaQaArbzEALw_wcB&wbraid=CkAKCAjw39zSBhAeEjAAXSXt-shUI6R9x48bJmJs0aWgJGlturueRTyKYP3xwCV8c7F1h3pcczORmQAXoRwaAhVW&gbraid=0AAAAADA7Q_K6tTXTAzO3C5tkYtnevtI50&adtype=pla&loc_physical_ms=1006944&loc_interest_ms=&gad_source=1&gad_campaignid=20506529270&gbraid=0AAAAADA7Q_K6tTXTAzO3C5tkYtnevtI50)

Title: Re: Magura 15mm Master Cylinder Reservoir Retaining Screw
Post by: Tiedie on July 16, 2026, 04:36:11 PM

Quote from: dogshome on July 16, 2026, 02:25:19 PM

Looks like an M3x10mm self tapping screw.https://www.ebay.co.uk/itm/358480511492?_ul=GB&rb_itemId=358480511492&rb_pgeo=GB&var=626674479201&ff=11&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5339059258&toolid=10044&customid=Cj0KCQjwguLSBhDLARIsAH-yPrHFz_8klqrFH-owJRCMFiC4fgUEQGhZBy3Yw_3s4qxSIoXQ_PL1zaQaArbzEALw_wcB&gclid=Cj0KCQjwguLSBhDLARIsAH-yPrHFz_8klqrFH-owJRCMFiC4fgUEQGhZBy3Yw_3s4qxSIoXQ_PL1zaQaArbzEALw_wcB&wbraid=CkAKCAjw39zSBhAeEjAAXSXt-shUI6R9x48bJmJs0aWgJGlturueRTyKYP3xwCV8c7F1h3pcczORmQAXoRwaAhVW&gbraid=0AAAAADA7Q_K6tTXTAzO3C5tkYtnevtI50&adtype=pla&loc_physical_ms=1006944&loc_interest_ms=&gad_source=1&gad_campaignid=20506529270&gbraid=0AAAAADA7Q_K6tTXTAzO3C5tkYtnevtI50 (https://www.ebay.co.uk/itm/358480511492?_ul=GB&rb_itemId=358480511492&rb_pgeo=GB&var=626674479201&ff=11&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5339059258&toolid=10044&customid=Cj0KCQjwguLSBhDLARIsAH-yPrHFz_8klqrFH-owJRCMFiC4fgUEQGhZBy3Yw_3s4qxSIoXQ_PL1zaQaArbzEALw_wcB&gclid=Cj0KCQjwguLSBhDLARIsAH-yPrHFz_8klqrFH-owJRCMFiC4fgUEQGhZBy3Yw_3s4qxSIoXQ_PL1zaQaArbzEALw_wcB&wbraid=CkAKCAjw39zSBhAeEjAAXSXt-shUI6R9x48bJmJs0aWgJGlturueRTyKYP3xwCV8c7F1h3pcczORmQAXoRwaAhVW&gbraid=0AAAAADA7Q_K6tTXTAzO3C5tkYtnevtI50&adtype=pla&loc_physical_ms=1006944&loc_interest_ms=&gad_source=1&gad_campaignid=20506529270&gbraid=0AAAAADA7Q_K6tTXTAzO3C5tkYtnevtI50)

Good find @dogshome. :tekst-toppie: