Author Topic: Hello, new member from Colorado with 1986 K75  (Read 1209 times)

Offline jaredc7

  • Curious
  • Posts: 3
Hello, new member from Colorado with 1986 K75
« on: December 03, 2018, 12:19:16 PM »
Hello all, new to the forum. I bought a non-running 1986 K75 about a year ago, and had it garaged since to finish a cafe racer build on a 1982 Honda CM450. Finally finished that project in September, wife and I had our first little this year, and now starting to get geared up to work on this K75.

I've seen the new member instructions, and will run my VIN soon this week. Just thought I would say hi and get introduced to you all here. I included a picture of my Honda cafe if anyone is interested, and my build thread is below. I do NOT plan on chopping up my K75 as much as I did the Honda. There is too much to love about the K75, so dont' plan on changing much!

https://www.hondatwins.net/forums/65-frame-suspension-steering/26932-cm450c-conversion-single-swing-arm-monoshock.html

  • Denver, CO
  • 1982 Honda CM450 Cafe Custom, 1986 BMW K75, and 2008 Kawasaki Versys

Offline jaredc7

  • Curious
  • Posts: 3
Re: Hello, new member from Colorado with 1986 K75
« Reply #1 on: December 03, 2018, 12:29:39 PM »
Here is my K75... pretty good shape for a $300 pickup!!! I was at this guy's house with the cash within 12 hours of seeing the online ad!
  • Denver, CO
  • 1982 Honda CM450 Cafe Custom, 1986 BMW K75, and 2008 Kawasaki Versys

Offline Chaos

  • ^ Quintessential Motobricker
  • Posts: 2400
  • Mars needs women!
Re: Hello, new member from Colorado with 1986 K75
« Reply #2 on: December 03, 2018, 12:36:48 PM »
Welcome, nifty job on the Honda.  Fantastic price on the K, very versatile bike.  Good luck, lotsa info & folks here to help work out bugs.
  • sw ohio
1987 K75S    VIN 0231
Original owner, Original litter
200,000 miles (plus or minus) and 5 paint jobs
2012 Ural 2WD sidecar (BMW's bastard step child)

Offline caveman

  • ^ Motobrick Curious
  • Posts: 100
Re: Hello, new member from Colorado with 1986 K75
« Reply #3 on: December 03, 2018, 01:57:39 PM »
welcome, nice work on the Honda!
I'll give ya $400 for the K right now?
  • Kennerdell, PA.
  • 87 K100RT, 88 K100LT

Offline Gibson

  • Motobrick Curious
  • Posts: 44
Re: Hello, new member from Colorado with 1986 K75
« Reply #4 on: December 03, 2018, 03:16:13 PM »
Nice find! Love the blue.
  • Dix Hills NY
  • K75 ABS and R100Mystic

Offline natalena

  • ^ Proficient Motobricker
  • Posts: 397
Re: Hello, new member from Colorado with 1986 K75
« Reply #5 on: December 03, 2018, 09:04:55 PM »
Welcome, and your brick looks like a stellar bang for the buck.
  • East of Joshua Tree
  • 1987 K75s #0919
On Holy Quest seeking Techron equivalent for splines.

Offline Barry in IN

  • ^ Proficient Motobricker
  • Posts: 181
Re: Hello, new member from Colorado with 1986 K75
« Reply #6 on: December 03, 2018, 09:32:02 PM »
Welcome. That’s a pretty neat and nimble looking K75.
  • Indiana
  • 1992 K75S Lili Von Shtuppe
A pox on cafe “builders”

Offline jakgieger

  • itinerant farmer
  • ^ SuperNatural Motobricker
  • Posts: 557
Re: Hello, new member from Colorado with 1986 K75
« Reply #7 on: December 04, 2018, 08:33:03 AM »
Welcome from your neighbor to the east!  I bet that you will like the K just as it is.  A little more complexity on the K, but with EuromotoElectrics and Ebay, you will have it operational in no time...most likely before riding season.  Good Luck.
  • Kansas USA
  • 1989 K100rs se
"What we've got here is failure, to communicate.  Some men, you just cain't reach.  So you get what we had here last week.  Which is the way he wants it...Well, he gets it.  I don't like it any more than you men do."

Offline jaredc7

  • Curious
  • Posts: 3
Re: Hello, new member from Colorado with 1986 K75
« Reply #8 on: March 29, 2019, 02:54:24 PM »
Thanks all, appreciate the replies. The previous said this bike sat in his garage for 15 years before he sold it to me... plus the 1 year I've owned it done nothing.

Per the wife, selling my Kawasaki Versys and going to get this K75 up and running. Apparently 3 motorcycles is too many? Doesn't seem right to me, but I think I'd rather ride the K75 than the Versys anyways. Hopefully I can get it ready before this 2019 summer season. After reading through a few threads here, as well as the K75 repair manual, it looks like I'll need to replace all of the following without even bothering to check if they work (sitting for ~16 years, 26k miles). Let me know if I'm missing anything?!

Fuel system (pump, lines, filter, and injectors), spark plugs, oil & oil filter change, rear spline inspection, grease, etc., change gear and final drive oil, battery, check & grease all cables, check/change fork oil, check/change brake pads & fluid, radiator coolant flush/fill. Need to replace the bent handlebar and levers too while I'm at it.

After all that, was thinking of getting new exhaust, gauges, lights (head, tail, blinkers), seat, and maybe even a matte/metallic blue vinyl wrap on the fuel tank and side panels.
  • Denver, CO
  • 1982 Honda CM450 Cafe Custom, 1986 BMW K75, and 2008 Kawasaki Versys

Online Laitch

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  • Posts: 6700
Re: Hello, new member from Colorado with 1986 K75
« Reply #9 on: March 29, 2019, 03:58:26 PM »
Let me know if I'm missing anything?!
Clean and apply lube to the transmission input splines. Whatever might have been on them has degraded by now. Replace the clutch rod boot and waterproof the gear position indicator.
  • Along the Ridley in Vermont.
  • 1995 K75T 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Offline SDCR john

  • ^ Motobrick Curious
  • Posts: 83
Re: Hello, new member from Colorado with 1986 K75
« Reply #10 on: March 29, 2019, 07:04:02 PM »
laitch,

I have not found anything on this. Would you please expand on the procedure?

Thanks.

 
Quote from: Laitch link=topic=11969.msg108666#msg108666 date....... and waterproof the gear position indicator.
[/quote
1994 BMW K75S Dakar Yellow #0154446
1983 Moto Guzzi 850 Le Mans
2000 BMW R1100 RS
Bucks County Pa.

Offline The Mighty Gryphon

  • ^ Quintessential Motobricker
  • Posts: 4534
Re: Hello, new member from Colorado with 1986 K75
« Reply #11 on: March 29, 2019, 07:38:22 PM »
I would start by doing all the fluids and posting a photo of the inside of the tank so the oracles here can give informed guidance on what may be needed.  No need to spend a bunch of money if it isn't necessary.

As Laitch mentioned, lube the all the splines including the transmission input/clutch splines.  This will require pulling the transmission, which will allow you to check for oil leaks at the rear engine seal and the clutch o-ring.  Even if they aren't leaking, they probably will when you start running the bike.

Another job is to replace the breather tube(AKA Z-tube that runs from the crankcase to the airbox).  They aren't very costly, and are fragile where they are clamped.

The brakes are probably an area where you will need to spend some time and possibly some money.  16 year old brake fluid is going to be very nasty stuff.  A lot of it will probably be crystallized in the system.  Figure a quart of DOT 4 to flush the system.  Once the system is flushed, be prepared to find that the rear master cylinder leaks.  You may find that the brakes stick and drag because of crap in the lines plugging everything up.  It's a good idea to plan on new stainless braid brake lines, and a new master cylinder.  Fortunately, there is information here on replacing the $250 OEM master cylinder with a $10 Chinese unit.

Last, get a can of Deoxit D-5 and go through all the electrical connections with it.  A lot of the problems on these old bikes can be prevented by cleaning all the connectors.  Be especially focused on the bike's ground points, one on the transmission above the shift lever, and the other under the tank on the main frame backbone.  Clean up the ground connectors with 600 grit so they're nice and shiny.  I like to put a thin film of dielectric grease on the connections to keep them from getting wet and corroding.

With all that done, get a fresh battery, a gallon of no-corn  gas, and try to start the engine.  Chances are it will run like crap.  Put a can of Chevron Techron or Seafoam in the tank, start the engine and let it run a few  minutes to circulate the stuff and shut down.  Let it sit for day and start again.  It will take a few days to get the crap out and get things running well if you're lucky.  If not, you will need to clean the injectors.  Lots of information on doing that.
  • In my garage in Marilla, NY
  • '94 K75RT Mystic Red, '91K100RS White/Blue
Current:
'94 K75RT "Ilsa, She Wolf of the SS"
'91 K100RS "Moby Brick Too
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Online Laitch

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  • Posts: 6700
Re: Hello, new member from Colorado with 1986 K75
« Reply #12 on: March 29, 2019, 09:00:08 PM »
I have not found anything on this. Would you please expand on the procedure?
In the attached image can be seen the gear position indicator switch cover, the clutch rod boot, the clutch lever (arm) and over on the right side, the transmission's splined output shaft. It's splined input shaft is on the other side. The input shaft engages with the clutch disc's hub. The shaft's splines should be carefully lubed with moly paste or Staburags paste.

The area in the attached photo can be a challenging environment of heat, grit and moisture. If the switch cover is damaged, the gear position indicator switch can become faulty from moisture incursion. Silicone or PlastiDip are some of the compounds applied to the cover to protect it from the elements. If the clutch rod boot is damaged, transmission oil is likely to leak from it, so treat it carefully and consider being ready to replace it if necessary.



A parts fiche like the one at MAX BMW has helpful diagrams of assemblies and can be used to determine which parts can be used on your moto. Get acquainted with one.
  • Along the Ridley in Vermont.
  • 1995 K75T 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Online Laitch

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  • Posts: 6700
Re: Hello, new member from Colorado with 1986 K75
« Reply #13 on: March 29, 2019, 09:29:34 PM »
Here is my K75...
That is a k75C; the drum brake and fairing tell us so.
  • Along the Ridley in Vermont.
  • 1995 K75T 72,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

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