Author Topic: Bob's 85 K100 Project  (Read 1620 times)

Offline bobvans

  • Motobrick Curious
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Re: Bob's 85 K100 Project
« Reply #25 on: November 24, 2019, 03:30:29 PM »
greetings...

the rs motobrick... the worlds most eloquent moto... excluding the hd pan american of course...

j o

Yes... I wish it was in much better shape.  It supposedly ran before it sat for years but it would take some effort to get it running again.  Maybe not for some of you Motobrick experts :-)  Sitting out in the elements wasn't kind to it,
  • USA
  • '85 K100

Offline Texer

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Re: Bob's 85 K100 Project
« Reply #26 on: November 30, 2019, 05:44:58 AM »
Thatís a good parts source for the price - and - you get your fairing and attachment hardware.  If you have the storage, you are pretty set up.
  • Wa
  • 1987 K100rs

Offline Laitch

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Re: Bob's 85 K100 Project
« Reply #27 on: November 30, 2019, 09:59:20 AM »
So I've been looking around on what it would take to add that fairing to my bike.  Lots of parts on ebay but I'm sure there are a million little parts that I would need to pull this off that aren't as obvious as the fairing pieces themselves. . . .  My tentative plan is to swap the fairing over since my bike runs and runs well.
You probably should take onboard what is written in this post, especially the reference to rubber frame mounts and consequent vibration which could affect the fairing if it's mounted on your naked Brick without them. The frame part numbers differ for the K100 and the K100RS and the frame to engine tightening sequences/shim clearance points are different, which might have implications on fitment.

It's a challenging project and others are likely to learn from your experience.
  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
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Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #28 on: November 30, 2019, 02:08:54 PM »
You probably should take onboard what is written in this post, especially the reference to rubber frame mounts and consequent vibration which could affect the fairing if it's mounted on your naked Brick without them. The frame part numbers differ for the K100 and the K100RS and the frame to engine tightening sequences/shim clearance points are different, which might have implications on fitment.

It's a challenging project and others are likely to learn from your experience.

Thank you for the advice.  I will definitely read thru the post you suggested.  Didnít realize the frames are different.  That could be a potential issue.  But you know, the more Iíve been thinking about this, the more I like the idea of trying to get it running.  Once I get it (hopefully this weekend) I can take a closer look at it.  Supposedly the PO pulled the fuel pump to get his other bike running.  Makes me wonder why he wanted that bike running vs this one.  So maybe just the fuel pump and a battery
  • USA
  • '85 K100

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #29 on: November 30, 2019, 02:13:49 PM »
Thatís a good parts source for the price - and - you get your fairing and attachment hardware.  If you have the storage, you are pretty set up.

Yes, thatís what Iíve been thinking too.  Althiugh now Iím leaning towards trying to get it running.  That way I donít need to take my good bije off the road and can tinker on the new one as I have time.  Weíll see how it goes.

Hey, I see youíre from WA state.  Where abouts?  Iím in Vancouver, down by Portland.
  • USA
  • '85 K100

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #30 on: November 30, 2019, 03:16:23 PM »
Thank you for the advice.  I will definitely read thru the post you suggested.  Didnít realize the frames are different.  That could be a potential issue.  But you know, the more Iíve been thinking about this, the more I like the idea of trying to get it running.  Once I get it (hopefully this weekend) I can take a closer look at it.  Supposedly the PO pulled the fuel pump to get his other bike running.  Makes me wonder why he wanted that bike running vs this one.  So maybe just the fuel pump and a battery

In reading thru that post it seems the challenge is more with the later, 16V versions of the K bikes.  So hopefully the earlier ones are more similar in design.  I guess I'll find out soon enough  :bmwsmile
  • USA
  • '85 K100

Offline Martin

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Re: Bob's 85 K100 Project
« Reply #31 on: November 30, 2019, 03:34:01 PM »
Bob to cheer you up a piccie of a K100S. Dream and you can sometimes make it so.
Regards Martin.

* BMW K100s 2.jpg (107.4 kB . 768x576 - viewed 131 times)
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Laitch

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Re: Bob's 85 K100 Project
« Reply #32 on: November 30, 2019, 05:29:24 PM »
So hopefully the earlier ones are more similar in design. 
It's the vibration effect on the fairingóif anyógenerated by your moto's frame missing the rubber mounts that are on the RT and RS that will be useful for some owners to know. Please post photos as the project proceeds.

Is the rear of your moto's tank bolted to the frame, or pinned into grommets?
  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #33 on: December 01, 2019, 02:44:10 AM »
It's the vibration effect on the fairingóif anyógenerated by your moto's frame missing the rubber mounts that are on the RT and RS that will be useful for some owners to know. Please post photos as the project proceeds.

Is the rear of your moto's tank bolted to the frame, or pinned into grommets?

My running bike, the red one,  has the old style tank... with the mounting plate ate the rear.  Not sure about the blue one I just bought.  Itís in my garage now so will take a look.
  • USA
  • '85 K100

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #34 on: December 01, 2019, 02:55:12 PM »
Bob to cheer you up a piccie of a K100S. Dream and you can sometimes make it so.
Regards Martin.

* BMW K100s 2.jpg (107.4 kB . 768x576 - viewed 131 times)

Thank you for the motivation, Martin.  That's actually the color I had in mind!

I was out looking at the RS this morning and I'm getting more and more excited to get it back on the road.  I did a real basic look over and here's what I've found so far...

- Missing battery (no surprise)
- Missing Jetronic controller (a surprise)
- Shifts up thru the gears ok, at least standing still
- No ignition switch that I can find, so maybe the PO just hard wired it?  No, that would leave the lights on.  Hmmm don't know.
- The little "dashboard" where the ignition switch would normally be mounted is missing
- Some missing bolts and screws
- Missing the gas cap assembly
- Fuel pump is present (was supposedly pulled) but wires are disconnected so maybe the bad pump from the other bike was put in there?  Fuel filter is missing.
- It has the old style tank, with single rear mounting bolt, same as my other bike
- Flat front tire
- Front wheel hangs on rotation (warped rotors?)
- Back tire rotates fine
- Front break supposedly works but you have to pull it in completely to the handlebar if it does.
- Starter button broken
- Throttle extremely hard to turn
- Right mirror/signal not on the bike.  I have it.  It's missing one of the clips and the connector on the bike end was ripped off/missing
- Clutch appears to work
  • USA
  • '85 K100

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #35 on: December 01, 2019, 04:14:05 PM »
I found a controller on ebay that matched another one I found (but was sold) that claimed to fit all K100's.  Was asking $175, offered $120 and was accepted!  And so it begins...


* Jetronic.JPG (21.43 kB . 768x266 - viewed 96 times)
  • USA
  • '85 K100

Offline Martin

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Re: Bob's 85 K100 Project
« Reply #36 on: December 01, 2019, 04:34:30 PM »
I've seen worse brought back to life, and you're going in the right direction, engine first. Once going you can check the drive train on the centre stand partially without the risk of riding with zero brakes. Minor warps in rotors can be cured as long as discs aren't tramlined too much. Working on Bricks is a pleasant way to pass time and bond with your new acquisition. Keep at it you'll be rewarded in the end.
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #37 on: December 02, 2019, 01:42:21 AM »
Was curious about the fuel filter and how it was mounted.  After watching some Youtube and just messing around in the tank I managed to get it out.  Snapped a few pics for show and tell...


* Pump 1.JPG (26.67 kB . 432x576 - viewed 89 times)


* Pump 2.JPG (26.97 kB . 432x576 - viewed 88 times)


* Pump 3.JPG (26.49 kB . 432x576 - viewed 87 times)

Tank is in need of a cleaning...


* Tank 1.JPG (31.12 kB . 432x576 - viewed 89 times)


* Tank 4.JPG (36.92 kB . 432x576 - viewed 88 times)
  • USA
  • '85 K100

Offline Martin

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Re: Bob's 85 K100 Project
« Reply #38 on: December 02, 2019, 02:00:44 AM »
You don't have to sell a kidney to get a fuel pump OEM copies are around $36.00 Au. I've been running one since July 2017 and it hasn't missed a beat, even in 40C+ heat on a three day trip. See here http://www.motobrick.com/index.php/topic,10054.msg85798.html#msg85798.
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #39 on: December 02, 2019, 02:20:53 AM »
You don't have to sell a kidney to get a fuel pump OEM copies are around $36.00 Au. I've been running one since July 2017 and it hasn't missed a beat, even in 40C+ heat on a three day trip. See here http://www.motobrick.com/index.php/topic,10054.msg85798.html#msg85798.
Regards Martin.

Thanks, Martin.  Good to hear the cheaper options are a good way to go.  I will definitely go that route.

Been reading about how to best clean the inside of the tank.  I think I'll start with a water rinse or two to get all the yard debris out and go from there.  I've read about people using things like carb cleaner, baking soda and water, and vinegar.  Not all at the same time of course.
  • USA
  • '85 K100

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #40 on: December 02, 2019, 02:31:07 AM »
Just for fun I put my VIN into the BMW VIN finder and it came up with the following info...

http://bimmer.work


* VIN Decoded.JPG (46.14 kB . 751x554 - viewed 92 times)
  • USA
  • '85 K100

Offline E30_Crazy

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Re: Bob's 85 K100 Project
« Reply #41 on: December 02, 2019, 02:32:26 AM »
At this point, with a tank that dirty, the violent foaming action of baking soda and vinegar might just be beneficial...
  • Newport News, Virginia
  • '85 K100, '93 K1100RS
God created Crew Chiefs so Fighter Pilots could have heroes, too.

Offline Martin

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Re: Bob's 85 K100 Project
« Reply #42 on: December 02, 2019, 02:56:20 AM »
Soaking with cheap old cleaning vinegar seems to work most of the time. This can be used in conjunction with scouring pads, a pad on a blunt piece of dowel can be used for hard to reach places.
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline The Mighty Gryphon

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Re: Bob's 85 K100 Project
« Reply #43 on: December 02, 2019, 09:24:43 AM »
Scotchbrite, Dawn detergent, and white vinegar were my best friends last summer when I did the tank on my "new" K100RS. 

Be sure to remove the fuel level sender before you start.  If the arm doesn't move don't force it.  I did and it cost me some large bucks to replace it.  I don't know the best way to free it up if it's rusted solid, maybe a week or two in vinegar followed by lots of penetrating oil(not WD40). 
  • In my garage in Marilla, NY
  • '94 K75RT Mystic Red, '91K100RS White/Blue, '89 K100RS Special edition White/Blue
Current:
'94 K75RT "Ilsa, She Wolf of the SS"
'91 K100RS "Moby Brick Too
'89 K100RS SE

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #44 on: December 02, 2019, 11:08:34 AM »
Thanks for the suggestions!  I'll get to it and will post pics of my progress, although progress will probably be slow  :bmwsmile
  • USA
  • '85 K100

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #45 on: December 02, 2019, 10:27:18 PM »
Scotchbrite, Dawn detergent, and white vinegar were my best friends last summer when I did the tank on my "new" K100RS. 

Be sure to remove the fuel level sender before you start.  If the arm doesn't move don't force it.  I did and it cost me some large bucks to replace it.  I don't know the best way to free it up if it's rusted solid, maybe a week or two in vinegar followed by lots of penetrating oil(not WD40).

That sounds like a good combination and I happen to have both of those.  I have the older tank config so no float to contend with... although it does have the old style 7L/4L level sense that tends to fail at some point and replacements aren't to be had.


* Tank Diagram.JPG (52.18 kB . 768x541 - viewed 78 times)
  • USA
  • '85 K100

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #46 on: December 03, 2019, 09:53:38 PM »
A few more pics...

I had thought the rear brakes worked but based on this picture I'm going to change my position...


* Rear Brake Tank.JPG (40.15 kB . 768x576 - viewed 73 times)

Picture of the area behind the alternator.  Hooking the battery up should be pretty straight forward...


* Alternator.JPG (77.66 kB . 768x576 - viewed 74 times)

This is the red LED that the PO mounted where the ignition switch would have been if the dashboard was still there.  Not sure what it's for?  Maybe to indicate ignition is turned on?  I suppose it could be several things if the lights from the instrument cluster don't work...


* LED.JPG (82.33 kB . 768x576 - viewed 72 times)

This is what was in the storage compartment.  Some CO2 cartridges to fill patched tires, a mouse nest (no mice), and some other misc stuff...


* Rear Cowl.JPG (73.29 kB . 768x576 - viewed 73 times)

As I was walking away and glancing at this bike and my good bike I started thinking of how much easier (and cheaper) it would be to just move the fairing parts over  :twothumbsupp

Oh, almost forgot to mention that I didn't see the ignition switch anywhere.  Will need to put in a concerted effort to locate it or at least the wires that would go to it.
  • USA
  • '85 K100

Offline volador

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Re: Bob's 85 K100 Project
« Reply #47 on: December 04, 2019, 01:47:38 AM »
You got a good shop vac and a bottle of Clorox bleach?
  • NYC
  • 1991 K100RS 1993 K75S ABS
5 BOROUGHS SISYPHEAN SOCIETY "When Life Throws You A Curve... Lean Into It"

Offline bobvans

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Re: Bob's 85 K100 Project
« Reply #48 on: December 05, 2019, 12:03:13 AM »
You got a good shop vac and a bottle of Clorox bleach?

I've got a decent shop vac but no bleach.  I have a knack of splashing that onto my favorite colored clothes so don't trust myself with it.
  • USA
  • '85 K100

Offline volador

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Re: Bob's 85 K100 Project
« Reply #49 on: December 05, 2019, 01:34:30 AM »
I've got a decent shop vac but no bleach.  I have a knack of splashing that onto my favorite colored clothes so don't trust myself with it.

* 5BSISYPHEAN BEN & JERRYS HAZ MAT SUIT.jpg (12.97 kB . 307x576 - viewed 131 times)

DuPont Tyvek 400 TY122S
  • NYC
  • 1991 K100RS 1993 K75S ABS
5 BOROUGHS SISYPHEAN SOCIETY "When Life Throws You A Curve... Lean Into It"

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