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mrfunkface Brick Rider
Joined: 24 Jan 2011 Posts: 27 Location: London, innit
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Posted: Mon Jan 24, 2011 1:05 pm Post subject: K1100RS restyle - Monster/TpR mashup |
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Hi All.
I've just got hold of a 1993 K1100RS. It's in passable condition but rather than restore it to its former glory, I have big plans!
After owning a Ducati Monster for a while, my preference is definitely for the streetfighter/flat track look, but unlike Il Monstro, I'm hoping the K1100 can last more than a few days before needing attention.
As a template, I'm particularly liking what TPR Italian Factory has done with an '82 K100 (http://www.tpr-italianfactory.com/motorcycle/bulldog/). My aim is therefore to get as close to this look as possible with additional tweaks, nips and tucks on the way, particularly retaining a (reasonable) pillion seat and some kind of pannier connection ability (possibly a secondary frame to be used as and when). Here and there I'll borrow some Monster details, such as the rear seat, the aim being to get something fairly aggressive but understated enough to not draw attention (bikes have a tendency to go missing overnight here in London... need to tread that fine line between appealing and apalling...).
I'm currently developing my knowlege of this bike and in particular compatibility with other K models - I find that while the K1100 is mechanically better, the older details from the K100 to be a little more refined than the K1100. I'm sure I'll have many more questions as this project progresses, but in the meantime if anyone can shed light on the following I would be most appreciative:
1. Are the K100 square exhausts compatibile with the K1100 (both 4-to-1)?
2. Are the K100 footrest plates (pre '90?) caompatible with the K1100 frame?
3. What is the largest wheel size produced in the 8-spoke K100 wheel? I would guess they don't go up to she size of the K1100? However I have heard (but cannot find evidence) that the K100RS had a special edition which used the older wheels with a 16v engine.
4. How much do the K1100s vary over the production time from '92-'96
Many thanks in advance - I'll post pics as this project progresses.
EDIT:
the dream:
 _________________ 1993 BMW K1100RS
2002 Ducati Monster S4
2003 Suzuki SV650S
Last edited by mrfunkface on Tue Jan 25, 2011 4:37 pm; edited 1 time in total |
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Flying Duck PsyKotic Waterfowl

Joined: 27 Jan 2005 Posts: 10102 Location: Bumf***, WA
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Posted: Mon Jan 24, 2011 2:23 pm Post subject: Re: K1100RS restyle - Monster/TpR mashup |
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| mrfunkface wrote: |
2. Are the K100 footrest plates (pre '90?) caompatible with the K1100 frame?
3. What is the largest wheel size produced in the 8-spoke K100 wheel? I would guess they don't go up to she size of the K1100? However I have heard (but cannot find evidence) that the K100RS had a special edition which used the older wheels with a 16v engine.
4. How much do the K1100s vary over the production time from '92-'96 |
2) Yes. They mount to the transmission, not the frame, and the the tops of the early plates are below the frame bolt.
3) 2.75x17. The rumor you heard is very unlikely to be true and there's no evidence of it in the parts catalog. They would've had to develop a special front wheel since the 2V and 4V brakes are very different.
4) Went from ABS I to ABS II in 94. Configuration under the seat changed to only accomodate the combined ABS II modulators/brain and only a "half" battery. Different Motronic. (ECU) Some minor component parts like the temp sensor. Different wiring harness with some different connectors.
Engine, frame, body, drive train, suspension, wheels, brakes all remained the same. There are some minor differences in the front brake lines between ABS I and ABS II bikes.
The LTs went from a 32A alternator to 50A in 94 but the RS always had the 50A alternator from the start in 93. _________________ 93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE
Last edited by Flying Duck on Mon Jan 24, 2011 3:10 pm; edited 1 time in total |
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hfxrzw Mad Brick Rider

Joined: 30 Jan 2009 Posts: 78
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Posted: Mon Jan 24, 2011 3:02 pm Post subject: |
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Just for ideas/drooling HERE _________________ Cheers, Rene
Greetings from Florida.
BMW K100 '85 |
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wedge Brick Rider
Joined: 01 Mar 2010 Posts: 29 Location: Wisbech, Cambs
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Posted: Mon Jan 24, 2011 4:33 pm Post subject: |
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That one does it for me, the tpr one doesn't at all. It's too scruffy and cobbled together looking to say "nice bike" and too tidy to say "nice rat" _________________ Bikes:
93 K75S
93 R1100RS |
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tibbe Flying Brick Rider
Joined: 14 Jul 2003 Posts: 190 Location: Lulea Sweden
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ken Mad Brick Rider
Joined: 26 Mar 2008 Posts: 89 Location: Denver
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Posted: Tue Jan 25, 2011 12:10 am Post subject: |
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I LIKE that GS thing. Iwannadothat. _________________ Ken in Denver |
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drikko Flying Brick Rider
Joined: 20 Nov 2009 Posts: 1966 Location: Brisbane, OZ
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Posted: Tue Jan 25, 2011 12:17 am Post subject: |
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Theres some nice pics here too.
http://www.advrider.com/forums/showthread.php?t=244841
There's a fully stripped out K100 cafe racer around here, often see it up Mt Nebo. Not sure what he did with the electric stuff, seems to have vanished!!
It sounds mighty alright too. _________________ K1100RS '97
Laverda RGS 1000 '84
Jim Young Trailer Sailer 5.7M WB
DISCLAIMER:- Anything I say may have been when I was drunk so please don't take it personally.
'Bigamy is having one wife/husband too many. Monogamy is the same.'
Oscar Wilde |
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mrfunkface Brick Rider
Joined: 24 Jan 2011 Posts: 27 Location: London, innit
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Posted: Tue Jan 25, 2011 5:12 am Post subject: |
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Thanks all!
Flying Duck: V comprehensive. Thought as much about the old rims. I'll dig out that pic which caused the confusion. Good news about the pipes. [EDIT: found the offending web page http://www.motorcyclespecs.co.za/model/bmw/bmw_k100rs%2091.htm - on closer inspection, the single calliper brakes are a dead giveaway]
hfxrzw: Haven't seen that one before. The key for me is fixing the stock rear- a little too chunky for my liking. But nice work nonetheless.
wedge: It's an acquired taste I know - a buddy of mine who's helping has an R80 cafe and he hates what I'm trying to do. Horses for courses I guess.
tibbe: v interesting! A little much for London commuting and may not work with a 4 cylinder but I like what he's done.
drikko: that's the page which got me interested in the K1100 - the TpS convinced me.
I'm picking up the bike tonight, ride around for a few days then tinker the hell out of it on the weekend. More questions will follow... _________________ 1993 BMW K1100RS
2002 Ducati Monster S4
2003 Suzuki SV650S |
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mrfunkface Brick Rider
Joined: 24 Jan 2011 Posts: 27 Location: London, innit
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Posted: Tue Jan 25, 2011 4:08 pm Post subject: |
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Got the beast home - it's a lot bigger than the Monster that's for sure! That fairing definitely has to go if I want to squeeze between the traffics...
If it wasn't for the smokey starts the centre stand would be off in a shot. Any solution to this? _________________ 1993 BMW K1100RS
2002 Ducati Monster S4
2003 Suzuki SV650S |
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wedge Brick Rider
Joined: 01 Mar 2010 Posts: 29 Location: Wisbech, Cambs
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Posted: Tue Jan 25, 2011 4:39 pm Post subject: |
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When you park up, tilt the bike to the right for 10 seconds before putting on the side stand _________________ Bikes:
93 K75S
93 R1100RS |
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Frank Flying Brick Rider

Joined: 30 Jan 2006 Posts: 170 Location: Gold Coast Australia
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Posted: Tue Jan 25, 2011 4:45 pm Post subject: |
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Hi Guys
That K75GS is one bike that BM should have built.
Looks good, but not too sure about some of the naked bikes. To me, most seem to be rat bikes. Just a personal observation. _________________ Ride safe
Frank
Gold Coast Australia
BMW 1997 K1100LT - White
Ulysses Member 33144
StruggleTown Tourers |
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mrfunkface Brick Rider
Joined: 24 Jan 2011 Posts: 27 Location: London, innit
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Posted: Tue Jan 25, 2011 7:26 pm Post subject: |
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Tip it for 10sec? Sounds like a recipe for a dropping...
RE: rat bikes - I'm going for a more vintage look with oxidised aluminium, tarnished steel, maybe some stained brass detailing here and there. Definitely not scrapyard!
I'm not too sure about the footrest plate. Here's my bike as it (should) look - the bolts don't correlate with the K100 in my first post... it' higher up in the K11 than in the K1 so maybe holes are hidden beneath...?
 _________________ 1993 BMW K1100RS
2002 Ducati Monster S4
2003 Suzuki SV650S
Last edited by mrfunkface on Wed Jan 26, 2011 7:56 am; edited 1 time in total |
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Flying Duck PsyKotic Waterfowl

Joined: 27 Jan 2005 Posts: 10102 Location: Bumf***, WA
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Posted: Tue Jan 25, 2011 8:36 pm Post subject: |
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Except for the paralever strut holes in the tangs on the back of the transmission housing, the transmission housings are identical. Take off the left peg plate and you'll see the holes for mounting the earlier peg plates. They're even threaded already. (You need to take the rubber donut off of the front one to mount the earlier pegplate.)
One issue you'll have is that the swing arm won't clear the earlier pegplate. You can either shim out the rear of it or use a pegplate from a K100RS4V.
K75S with K100RS4V right peg plate, K1100 transmission and paralever rear end: (done by me)
 _________________ 93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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mrfunkface Brick Rider
Joined: 24 Jan 2011 Posts: 27 Location: London, innit
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Posted: Thu Jan 27, 2011 8:54 am Post subject: |
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Thanks again Flying Duck, super helpful to know this. How much do you estimate I'd need to shim out the right to clear the arm? May have to consider the RS4V plates on both sides, 80s/90s styling and all...
I still haven't had time to fiddle with the bike but I do have a couple more Qs:
ABS: how much of a task is removing the ABS entirely, cables incl.? Doesn't work atm and all I get is a flashing red dash. Does it need digging deep into the bike innards?
Centre stand: what are the issues associated with taking this off? All I can tell right now is the smoking start (my K11 seems to smoke on start even if it's kept on centre stand all night...) and the engine/rear brake light cut-off. On that note, is there a way to bypass the sidestand cutoff switch?
Thanks again!
Nicely done on the K75S btw. _________________ 1993 BMW K1100RS
2002 Ducati Monster S4
2003 Suzuki SV650S |
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mrfunkface Brick Rider
Joined: 24 Jan 2011 Posts: 27 Location: London, innit
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Posted: Mon Jan 31, 2011 6:36 am Post subject: |
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Not quite on topic but I found an interesting image of a K100 diesel conversion. Apparently some kind of Diahatsu turbo diesel. Looks like a beast!
http://www.dieselbike.net/Hamm09/Hamm09.htm
 _________________ 1993 BMW K1100RS
2002 Ducati Monster S4
2003 Suzuki SV650S |
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mrfunkface Brick Rider
Joined: 24 Jan 2011 Posts: 27 Location: London, innit
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Posted: Sat Feb 05, 2011 6:27 pm Post subject: |
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So finally had a chance to get my hands dirty with the bike today. Ordered the wrong brackets for my 7.5" Ducati Monster headlight so only took off 2/3 of the fairing.
I'm looking to remove all the ABS components tomorrow and have a few Qs if anyone can help:
1. How can I definitively identify whether I have ABS 1 or ABS 2? I'm pretty sure I have ABS 1 as I have two ABS motors and it's a '93 bike - can this be confirmed?
2. I understand the ABS 1 system runs in parallel to the main braking system, ie the main brake lines are not integrated into the ABS system, more like the ABS can modulate the pressure on the callipers directly. This means I can remove the ABS components without affecting the main braking system. Is this correct?
Thanks in advance again. _________________ 1993 BMW K1100RS
2002 Ducati Monster S4
2003 Suzuki SV650S |
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Flying Duck PsyKotic Waterfowl

Joined: 27 Jan 2005 Posts: 10102 Location: Bumf***, WA
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Posted: Sat Feb 05, 2011 7:01 pm Post subject: |
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1) 93=ABS I
2) The ABS doesn't run in parallel. You'll need a brake line from the front master cylinder to the splitter to the front calipers and one in the rear from the master to the caliper. _________________ 93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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mrfunkface Brick Rider
Joined: 24 Jan 2011 Posts: 27 Location: London, innit
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Posted: Sat Feb 05, 2011 7:33 pm Post subject: |
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So, just to be crystal on this, to remove the ABS I would have to re-do the lines to bypass the unit? _________________ 1993 BMW K1100RS
2002 Ducati Monster S4
2003 Suzuki SV650S |
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robleyd Flying Brick Rider
Joined: 23 Jul 2009 Posts: 398 Location: Murbko, Australia
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Posted: Sat Feb 05, 2011 7:45 pm Post subject: |
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Absolutely; when you remove the ABS there will be a gap in the brake system between the master cylinders and their respective callipers.
You can confirm this for yourself by simply following the layout of the brake lines and hoses. _________________ David, owner of:
1996 K1100 LT |
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mrfunkface Brick Rider
Joined: 24 Jan 2011 Posts: 27 Location: London, innit
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Posted: Sat Feb 05, 2011 8:13 pm Post subject: |
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Boo. It got too dark to follow the lines today so I was going to check tomorrow. Thanks for the heads up!
So I guess for now I have to keep the ABS motors in place but can remove all the sensors, control unit and wiring. Bit of a pain but I'm not in any rush. _________________ 1993 BMW K1100RS
2002 Ducati Monster S4
2003 Suzuki SV650S |
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