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Old 07-19-2013, 09:34 AM   #1
DADODIRT OP
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Bringing the Tardis back to the future

I just picked up a 1986 K75c. I kinda like naming the bikes after sci fi. It's been mostly Star Wars up to this point. Gotta switch to Dr. Who for the K bike, hence the Tardis. It has been sitting in a garage, unridden, since 1998. I will be doing some of the basic maintenance, like fluids, battery, etc. I'm lucky enough to have a great independant BMW shop pretty close to home, so Harry is gonna get some work out of it, too.
I had to go to the other end of the state to pick the bike up.
Ended up meeting up with a budy and camping up above Alma for the night. We partied at Alma's only bar and found ourselves up above 12,000 the next morning.


Here she is in the work space. I can CAN fit four bikes in the garage.






The rear shock is shot. It was bleeding from the bottom of the spring. Is the stock shock re-buildable? If not-what's a good after market shock?





So far I haven't done much. The bike only has 12,xxx miles on it. The book says it was serviced at 10,000 in 1991.
Ashame the tires look good. They are probably too old to ride on.
I took the battery out, looked in the air filter(super clean) and took the tank off to see what might be hidden. Everything looks clean. The po did have a bit of a get-off and there are a couple minor dings in the tank.
I'd like to add some panniers to it, but that is off in the future.
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Old 07-19-2013, 11:44 AM   #2
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Tardis, that's a good name. Do you find that the bike seems bigger on the inside?
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Old 07-19-2013, 11:46 AM   #3
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Yes, Just go in the air intake, take a left past the kitchen, go to the second door on the right and there is the tranny.
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Old 07-20-2013, 04:40 AM   #4
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Nice looking bike. When does it get painted blue?
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Old 07-20-2013, 06:07 AM   #5
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Not too sure about painting it. I was trying to figure out some way to have it look like the Tardis without "POLICE CALL BOX" printed on it.

Still looking for an answer about the shock. Rebuildable?
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Old 07-20-2013, 06:56 AM   #6
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Quote:
Originally Posted by DADODIRT View Post
Still looking for an answer about the shock. Rebuildable?
There's bunches of used k-bike shocks on ebay, but it's still an old shock from an old bike.
I just looked closer at your pics....that looks like a Works Performance on there now - so it is rebuildable.

I had an '85 K100RS from new, and when the shock got tired I put on a Works Performance.
Had that same three-ramp spring preload setup where you could take coil sections out of the loop - neat idea.
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Old 07-21-2013, 05:11 AM   #7
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That's a really groovy bike. Kbikes are 100% responsible for me "getting it" regarding why BMWs are worth owning. And, that one is the coolest if the cool.
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Old 07-21-2013, 05:55 AM   #8
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YSS made the one I put on my K100
I don't recall what it cost. Worlds beyond the factory crap shock. Do the forks too.
The K handles just OK with the factory parts. With new suspenders it brings the handling up to the "decades ahead of its time" description usually thrown at these bikes.
http://www.yssusa.com/bmw_mono.php
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Old 07-21-2013, 07:37 AM   #9
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The forks are on the 'to-do' list, for sure.
I think I will start with the suspension issues. If I have the rear shock off it will give me a reason to take the FD off and work on lube spline and clean up.
Thanks for the input.
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Old 07-21-2013, 07:55 AM   #10
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nice bike ... a national search on craigslist for K75C reveals pages of hits. sure are a LOT of these for sale out there...
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Old 07-21-2013, 08:35 AM   #11
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Originally Posted by DADODIRT View Post
The forks are on the 'to-do' list, for sure.
I think I will start with the suspension issues. If I have the rear shock off it will give me a reason to take the FD off and work on lube spline and clean up.
Thanks for the input.
I think that's well advised. I'd look at the FI system too. Replace all the rubber on the engine, including the injector seals (cheap). The engine will run tip top if you don't have vacuum leaks and problems with old lines.

Also don't run the old fuel filter with new fuel. Just go ahead and change it and the soft lines in the tank. Cheap cheap way to avoid trouble.

Clean the starter while you're at it.
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Old 07-21-2013, 09:23 AM   #12
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Yes, Just go in the air intake, take a left past the kitchen, go to the second door on the right and there is the tranny.
That's funny there!

I had a K100RS - great memories on that Teutonic Wurlitzer.

Enjoy the K75!
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Old 07-21-2013, 12:03 PM   #13
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Old 08-17-2013, 10:01 AM   #14
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Little (none) progress, but a question...

about old gas. There is about a gallon of old old gas in the tank. I am going to contact the city about disposing of it, but what is a good cleaner for the tank interior? I don't want to replace the filter and all the fuel injection bits just to have it gunk up or run poorly.
TIA
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Old 08-17-2013, 10:16 AM   #15
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A brief search came up with Red-Kote and Kreem.
Looks like the Red-Kote is available locally.
The Kreem website had some directions.
Anyone use either of these, or something else?
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