BMW K bikes (Bricks)

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So the process of getting my K100 back on the road has started. Local BMW specialists were able to clean up the spark plug thread so that is my major issue solved. 

Got to replace the fuel hose and missing injector clips as a priority, plus some injector leads and one of the coil packs. Still got to patch the leaking tank too.

Lower on the priority list are:
- Headlight glass 
- Oil leak from clutch boot
- Replace fork seals
- Check final drive rear bearing
- Replace rear tyre (the one it is brand new but is an 80 profile)

The one problem stumping me at the moment is the rear brake master cylinder. It is missing all the parts from the lever end. I was going to buy another but they seem to be NLA. Might have to try and get a kit and hope the rest of it is ok. Does anyone know anywhere likely to still have stock?

Last edited by naut023 on Fri Apr 12 2024, 02:56; edited 1 time in total (Reason for editing : added the last sentance)

1985 K100RS

92KK 84WW Olaf

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Nothing wrong with an 80 profile tyre on the rear.

But I would look at the date, if over 5 years old bin it.

I must admit some of my Ks came with Lasertecs on and I found them to be absolutely lethal. I personally wold not even use a new one.

Lots of different tyres out there but I and many others use Bridgestone Battlax BT45/46. They are great in all weathers and I love them as a wet weather tyre.

For the rear master cylinder they all die with age due to bad seals, bad pistons and/or bad bore. There are BMW repair kits available. You can get Chinese eBay replacements or used ones from places like and more.

1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 49,200 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles

1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500


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naut023 wrote:

Got to replace the fuel hose and missing injector clips as a priority, plus some injector leads ..

The clips, leads (and I think even the injectors) you can get at the wreckers from a Hyundai Excel '94-'98, plus a lot of other brands.

11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km

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