BMW K bikes (Bricks)

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1Back to top Go down   Another one in the barn Empty Another one in the barn on Wed 27 Feb 2019 - 14:47

andy442

andy442
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I think i'm starting a collection. I went out and got a K1100lt today. Think I did ok on it got 104000 miles on it and it looks to be in fairly good shape. But here's what I think I might do-since my k75s is real close to the same color, and it is in pretty bad shape- I was thinking about taking the faring and putting on the 1100. I think that the 1100 would make a nice sport bike. I'm wondering if any of you folks has tried this. I'm sure it will take some modification here and there, but that ain't no big deal.


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1988 k75s, 1964 R60/2, 1998 FLHR, and now a K1100LT
    

2Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Wed 27 Feb 2019 - 15:10

Laitch

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Please post photos in the Renovation/Customization section when you begin this transformation.


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1995 K75 81,000 miles
Another one in the barn Usa-lo10
    

3Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Wed 27 Feb 2019 - 15:32

MartinW

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A member of the BMWMCQ put a K75s fairing on a K100, he said at the time it was pretty straight forward. Then proceeded to polish the engine with Sunlight soap and stainless steel wool that was probably 15 years or so ago.
Regards Martin.
Another one in the barn Bmw_k110


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K75s Hybrid
    

4Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Wed 27 Feb 2019 - 17:04

duck

duck
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Putting a K75S fairing on a K100?

1 - The K75 tank is narrower. Did he swap tanks?

2 - The K75S fairing is meant to work with a K75 frame and radiator. I wonder how he tackled that. The K75 radiator is smaller and the front of the K75 frame is more angled due to the "missing" cylinder.

3 - Looks like a K100 belly pan.  (I know you can adapt a K75 belly pan because I did on my K100.)


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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

5Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Wed 27 Feb 2019 - 20:36

MartinW

MartinW
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Geez Duck you are straining my brain cells it was at least 15 years ago could be more. From what I can remember he got the complete fairing possibly from a bike wreckers along with everything he required to do the conversion, I remember that it cost him a good sized lump of cash. If you look at the only picture that I was able to find the tank looks to be the same colour as the rest of the bike the fairing and belly pan looks to be a different colour. When I saw it last it was all painted silver, and there was no gaps between the tank and the fairing. If you didn't know any better you'd think it was OEM. With my 75 the fairing support spider bolts to the steering head so the front frame rails shouldn't be a concern. It might be possible to contact the BMWMCQ and see if he and the bike are still members, I'm sorry I can't even remember his name. However there might be other OZ QLD members who can add information.https://www.bmwmcq.org.au/bmw/
Regards Martin.



Last edited by MartinW on Wed 27 Feb 2019 - 20:42; edited 1 time in total (Reason for editing : added link)


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K75s Hybrid
    

6Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Wed 27 Feb 2019 - 21:01

duck

duck
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I was just musing about how that could be done.  Not expecting you to have all of the answers.

The thing about the radiator and frame is the angle of the frame pieces that go from the steering head to the front of the motor and the radiator size.  If you try to put a standard K75 radiator surround on a K100 it simply won't work so I wonder how one could get the bottom of a K75S faring to fit on a K100.

Since the K75RT has an adapted K100RT fairing the K75RT uses the larger K100 radiator and tank as well as having a piece at the bottom that pushes the bottom of the radiator out from the K75 frame to make up for the "missing" front cylinder.  #7

Another one in the barn Thumb_xk



Last edited by duck on Thu 28 Feb 2019 - 0:47; edited 1 time in total


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

7Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 0:04

andy442

andy442
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Well I guess there's only one way to find out. Good to hear about the belly pan though that was the one thing I wasnt too sure about. As for the radiator surround, that bolts to the fairing and I was thinking IF the fairing will fit around the tank that I might be able to rework the brackets from the frame, but I won't know until I start doing it. I'll keep you posted though.


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1988 k75s, 1964 R60/2, 1998 FLHR, and now a K1100LT
    

8Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 0:58

Point-Seven-five

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Another one in the barn Dscn2910
I'm sure everyone has seen where the fairing was cut away to clear the coolant hose rising from the pump to the radiator. 

If you look close, you can see where the bottom edge of the fairing in front of the radiator was cut away to clear the timing chain cover.  I wouldn't be surprised if there wasn't more fairing cut away around the radiator.

Closer inspection reveals that the fairing was also cut away around the radiator grille to clear the radiator, the bar between the two openings looks a lot thinner than on my K75S.  I can't tell from the photo, but I'd be wiling to bet the grille is not there anymore.


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Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

9Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 1:51

duck

duck
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I agree with .75 that it looks like the inside of the radiator panel looks like it's been trimmed.

To put a K75 belly pan on a K100:

Use the front engine mounting bracket from a K75 and drill some new holes in the belly pan to line up with that bracket: #15

Another one in the barn Thumb_4cz

For the rear I used the rear BP bracket from a K1100RS: #2

Another one in the barn Thumb_4f5


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

10Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 2:08

Laitch

Laitch
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@duck wrote:I agree with .75 that it looks like the inside of the radiator panel looks like it's been trimmed.

To put a K75 belly pan on a K100 . . .
The OP is intending to install these items on a K1100 rather than a K100, if that would make any difference at all. He seems up for the challenge regardless.


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1995 K75 81,000 miles
Another one in the barn Usa-lo10
    

11Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 4:28

MartinW

MartinW
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.75 from memory I believe the mesh was still in place but possibly modified.
Regards Martin.


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K75s Hybrid
    

12Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 6:43

andy442

andy442
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Duck, I see in your signature that you took a k75 belly pan and put on a k100. Did you use the k75 brackets?  It looks like the 1100 block has provisions for the front k75 bracket. I'm wondering if the 4v block is close enough to make the belly pan work?


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1988 k75s, 1964 R60/2, 1998 FLHR, and now a K1100LT
    

13Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 7:46

duck

duck
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@andy442 wrote:Duck, I see in your signature that you took a k75 belly pan and put on a k100. Did you use the k75 brackets?  It looks like the 1100 block has provisions for the front k75 bracket. I'm wondering if the 4v block is close enough to make the belly pan work?

See my post #9 above.  The oil sumps are the same so using the K75 front bracket on a K1100 motor shouldn't be an issue.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

14Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 10:37

andy442

andy442
active member
active member
I took the lowers off and I held the belly pan up. It looks like ot will fit with some modifications-big surprise Rolling Eyes. The holes for the front bracket look to be off by about 2-3 inches, and the sight glass will be covered. But I think that is to be expected due to the fact that it's off a triple. Just gotta figure out the rear. Haven't got the upper off yet so that will be another story!


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1988 k75s, 1964 R60/2, 1998 FLHR, and now a K1100LT
    

15Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 11:34

92KK 84WW Olaf

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How do the clocks work on the K75S?

On my K100 they are bar mounted and rotate with the bars.

On my K1100 they are fairing mounted and do not rotate with the bars. I guess this is how it would have to be done, not sure what spider bracket is used with K75S fairing...is it the RT spider bracket? If so then I suspect a K1100 spider bracket needed but not sure oft he bolt mount points.

Just food for thought.


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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 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

16Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 11:51

duck

duck
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Life time member
Cluster is fixed on a K75S.  It sits in the main fairing bracket off of the steering head. The bracket is unique to the K75S and unfortunately is made of plastic so that the cluster, headlight and fairing bounce around a bit while riding.

Another one in the barn 46631455269_1_B

The cluster counterweight (or whatever you choose to call it) is the same as for other Ks with a fixed cluster. (K1100LT, K100RT/LT, K75RT)


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

17Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Thu 28 Feb 2019 - 18:40

MartinW

MartinW
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Apparently the bolts that attach the spider sometimes loosen off which contributes to the bounce. A few owners have used blue Loctite to stop the bolts loosening. My fairing is tight and the spider has never been off I do however have a slight jiggle of the instrument pod.
Regards Martin.


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K75s Hybrid
    

18Back to top Go down   Another one in the barn Empty Re: Another one in the barn on Fri 1 Mar 2019 - 1:04

duck

duck
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Life time member
@MartinW wrote:Apparently the bolts that attach the spider sometimes loosen off which contributes to the bounce. A few owners have used blue Loctite to stop the bolts loosening. My fairing is tight and the spider has never been off I do however have a slight jiggle of the instrument pod.
Regards Martin.

Interesting observation.  I noticed in my car's rear view mirror that the fairing on the dead K75S I bought a few weeks ago was bouncing around quite a bit when trailering it home.  When it warms up enough here for me to start working on the bike I'll be sure to tighten and Loctite those bolts to the steering head.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

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