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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: foliver on July 04, 2021, 07:20:26 AM

Title: front weel bearings K75
Post by: foliver on July 04, 2021, 07:20:26 AM

Helo all!
I'm working on my K75 to wake it up after 6 years, and i would like to know how to test if my front bearings are good, or if i change them straight.

i'seen these:
https://www.euromotoelectrics.com/product-p/wheelbearing335.htm

i guess is a 2 bearings and 2 bearing seals for the front wheel right?

Thanks!

Title: Re: front weel bearings K75
Post by: Laitch on July 04, 2021, 08:59:22 AM

Quote from: foliver on July 04, 2021, 07:20:26 AM

i guess . .  .

You aren't actually guessing, are you, foliver? You have a service manual, correct?

Those bearings are not for your moto's front wheel. Look at the Application Table on that page. Your moto isn't on its list for fit. That bearing is an angular ball bearing. Yours are sealed grooved ball bearings.

Test the bearings in the wheel when it is mounted on the fork. With the wheel off the pavement, grip the wheel on opposite sides then try to wiggle it backwards and forwards. Move the wheel 90º and try wiggling it again. If there is no movement, rotate it to listen for grinding within the bearing. Don't mistake the noise of brake pads scraping on the rotor for noise coming from the bearings. Listen at both sides of the wheel.

If there is no movement or noise, replacement of the bearings is your choice and depends on your ability to tolerate uncertainty.  :laughing4-giggles:

Title: Re: front weel bearings K75
Post by: foliver on July 04, 2021, 11:16:11 PM

Hello Laitch, thanks for your repply.
You are right!, i've found the correct ones:

https://www.euromotoelectrics.com/product-p/wheelbearing967.htm

Yes, i've the manual!

i think even if they feels ok, i'll change them, i've spend so much money on parts, that it worth the pain, thinking in a long trip, i want to concrete for the next year.....

thanks again for the tips.

fabian

Title: Re: front weel bearings K75
Post by: volador on July 04, 2021, 11:59:44 PM

Welcome

Some links for your K journey

Just bought a 2V (http://www.motobrick.com/index.php/topic,370.0.html)

Just bought a 4V (http://www.motobrick.com/index.php/topic,465.msg960.html#msg960)

Check parts compatibility with BMW MAX Microfiche, BOBS BMW, REAL OEM

https://shop.maxbmw.com/fiche/PartsFiche.aspx

https://shop.maxbmw.com/fiche/PartsSearch.aspx

https://parts.maxbmw.com/BMW___BmwMotorradK.html

https://www.bobsbmw.com/store/microfiche/BrowseSeries.aspx

https://www.realoem.com/bmw/select.do?kind=M&arch=1

https://www.ascycles.com/BMW-Motorcycle-Parts-Fiche

Cross reference parts like Bosch pn#'s, etc....  http://partsplusecat.com/
No spaces in the part number

Parts Vendors

https://www.beemerboneyard.com/

https://www.capitalcycle.com/

https://www.euromotoelectrics.com/

https://www.tills.de/

Headlight relay stuff if you chose to add one

https://www.motobrick.com/index.php?topic=268.0

http://www.motobrick.com/index.php/topic,4962.msg30932.html

http://culayer.com/product/matchbox-headlight-relay/

http://easternbeaver.com/Main/Wiring_Kits/H4_Kits/h4_kits.html  Eastern Beaver site is a great reference for electrical connectors,plugs, etc...

http://www.k100-forum.com/

http://www.kforum-tech.com/Tech-page.html

http://www.kforum-tech.com/electrical/EFI/bike-wont-start-EN.htm

http://www.kforum-tech.com/Downloads/electrical/diagrams/interactive_diagrams.htm

http://www.kbikeparts.com/classickbikes.com/ckb.tech/0.ckb.tech.files/k100tshoot/K100.Troubleshoot.Start.2018.pdf

http://kbikeparts.com/index.htm

http://www.kbikeparts.com/classickbikes.com/ckb.tech/ckb.new2k.htm

http://www.kbikeparts.com/classickbikes.com/ckb.tech/ckb.tech.toc.htm

http://www.eilenberger.net/K75S/IgnitionSwitch/

http://www.verrill.com/moto/moto.shtml

this site has a lot of good info and breakdown pictures in the tech and tech resources sections for K1100 alot of the parts are on K75 & K100

http://www.k11og.org/forum/index.php?sid=2df953dde5715fd9001fbe69edec5ad0

https://ibmwr.org/index.php/k-bike-tech-articles/

This site has all kinds of technical specifications on all the BMW models    http://www.bmbikes.co.uk/mechanicalpages/kseriesmechanical.htm

http://largiader.com

http://bmwk10075abs1fix.web.fc2.com/index.html  Toshi ABS site

Hosa D5S-6 CAIG DeoxIT 5% Spray Contact Cleaner, 5 oz. (https://www.amazon.com/gp/product/B00006LVEU/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1)

CAIG Laboratories D100L-25C Contact Cleaner Needle Dispenser (https://www.amazon.com/gp/product/B0000YH6F8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1)

Title: Re: front weel bearings K75
Post by: foliver on July 05, 2021, 08:49:25 AM

Thanks a lot Volador!!
Lot of help I”ll keep this info!!

Fabián

Title: Re: front weel bearings K75
Post by: frankenduck on July 05, 2021, 02:24:50 PM

It's very rare for K front wheel bearings to go bad.

If it ain't broke don't fix it.

Title: Re: front weel bearings K75
Post by: foliver on July 05, 2021, 03:50:44 PM

Hi Frankenduck, if they’re good can i apply grease, or they don’t need maintenance?
Txs!

Title: Re: front weel bearings K75
Post by: frankenduck on July 05, 2021, 04:38:40 PM

Don't need maintenance.