A fresh brick in the household

[g4s]

Hi folks,  Greetings from Aotearoa New Zealand.
A long time visitor since I acquired an '87 K75S.
It came from a friend who had high-sided it and got the yikes riding motobikes. 
That was about 80,000 kms ago. The last time the mechanic saw the bike he pointed out a couple of things that need doing and suggested putting those dollars into another bike.

We are supposed to be renovating a bathroom, so there are extra $ in the bank account.
Long story short, I have come into ownership of an '86 K75S with less than 5,000 kms on the clock. 
 Apparently from a collector in Japan. The fellow I bought it from has replaced all fluids, the fuel hose (it revealed a split in the rubber at the certification inspection) and has ordered a new rear brake reservoir and brake master cylinder for me to install.

I am going to have a look at the drive splines and see how the lube is holding up. Is there anything else that I should be wary of before getting too carried away?
Here's a couple of snaps, one has 1/4 of its body weight in black cable ties and insulation tape.

[Bon Jon Bovi]

Less than 5k k?? Incredible! The splines will definitely need attention as any lube will be cakey and not very lubey. The rubber bits may look fine and might seem offensive changing out practically 'new' parts, but their age is against them. The brake lines for sure should be on the list for replacement.

For us piccy-happy types, PLEASE document whatever you do as this should be a very unmolested version of a brick, with everything where the factory originally intended it. Most excellent find!

[Martin]

Welcome to the asylum. The K75s in my totally unbiased opinion is the pick of the litter. Unusual colour seat.
Regards Martin.

[K1300S]

nice find!  you got some miles to ride on that thing to catch up on where the mileage should be!!!

[g4s]

Hey Bon, Martin and mlytle, Cheers for your responses.
I do aim to keep a record of repairs and maintenence (incl photos) where possible. I almost feel a duty to do so.
There is a tame mechanic who lives nearby to do the more tricky procedures.

I have never owned an internal combustion engine that has done so little work.
There is quite a contrast to the two engine sounds in the two bikes.

Thanks mlytle for the midlife refresh link. Very informative.

[natalena]

Great looking low-mile brick to rehab. And, I like the label "precious", quite suitable for the "S" model.

[g4s]

What with us here in a lockdown, and the garage has been insulated and lined, I could spend some time on the brick.
I am pottering along, basically building confidence pulling apart and putting back together.

Removed the belly pan to see an oily gungy mess. Oven cleaner, toothbrush and a water blaster got rid of the worst of it.

There has been a brake fluid leak from rare reservoir and paint has lifted from foot pedal plate.
I figure a good soapy wash should remove any remaining residue, then a respray.

There is a bit of corrosion on the engine covers and rusty header pipe nuts.



Hopefully tomorrow (rain forecast) I will get to looking at the splines.
Kind of nervous but with the repair manual and this site I shoud get by.

[natalena]

Hopefully tomorrow (rain forecast) I will get to looking at the splines.
Kind of nervous but with the repair manual and this site I shoud get by.

Checking and re-lubing the DS/FD is one of the easier PM's to perform, and gives a great deal of satisfaction. I can't imagine you having issues, since you are mechanical enough to rebuild brakes.
* remember to support the swingarm (wood, stand, schoolbooks, etc), so it doesn't articulate down and ruin the rubber boot.

[milq]

Can't tell if my computer monitor is off-color or not...Is that sweet bike a root-beer color?

[volador]

Very nice looking motos! As mentioned that K75S looks like a rare color, what is the paint code under seat?

You got a torch? Replace the OE exhaust header mounting nuts with Stainless Steel or Monel nuts
Apply copper anti-seize to mounting studs

Good luck

Some links for your K journey

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

[g4s]

Hi milq, volador and natalena, yes it is a lovely colour. It is called Black Onyx. Code 622. I aim to polish the belly pan and see if that is the same colour. Hopefully not as I only have black spray paint and I want to sort out some wee scratches and blemishes.

I have spent 30 years learning and mastering cooking. I am also a good builder/carpenter/joiner.
 A lot less confident on a spanner. Invariably I take chunks out of my knuckles or round off bolt heads. I figure nice and easy with lots of looking up the site and reading through the process.
Also this is by far the newest, flashest thing I have owned and I don't want to  it up.

Cheers folks, I trust this virus will pass y'all by.
Glen.

[Martin]

A decent length mudflap is needed to protect the belly pan. On mine I went a bit further and used truck bed liner on the parts that were subjected to stone chips. See here 4 mudflaps and a dog dish for 90 cents. http://www.motobrick.com/index.php/topic,7914.msg57755.html#msg57755
Regards Martin.

[volador]

Looks like brown onyx on this side of the globe. I need to get me eyes checked.
Quite the find probably one of the lowest mileage bricks left in the southern hemisphere.

Patience, penetrating oil, heat gun and/or torch on those stubborn bolts and nuts. Or a BFH

[g4s]

Thanks for the tip and link Martin. Its a great idea, one I shall certainly use.
Great to get a bit of Dad humour into the start of the day too.

[volador]

A decent length mudflap is needed to protect the belly pan. On mine I went a bit further and used truck bed liner on the parts that were subjected to stone chips. See here 4 mudflaps and a dog dish for 90 cents. http://www.motobrick.com/index.php/topic,7914.msg57755.html#msg57755
Regards Martin.

Oh Crikkey, a bloody 4 mudflaps and a dog dish for 90 cents. I've now seen just about everything this site has to offer.

Thanks for the tip and link Martin. Its a great idea, one I shall certainly use.
Great to get a bit of Dad humour into the start of the day too.

No Dad Pants here mate
Good day

[The Mighty Gryphon]

A set of 6 point sockets goes a long way to avoid rounding off the more stubborn nuts.  Lots of penetrating oil is very useful(tip: WD40 is not penetrating oil).