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bikesnbones
Big Brick Rider
Joined: 03 Aug 2014
Posts: 74
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 Posted: Wed Feb 10, 2016 7:49 am Post subject: Converting an LT |
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Just wondering, how much of the LT fairing subframe is shared with the RS.
Basically, I've been offered a whole set of RS bodywork cheap, and fancy doing the conversion.
I swapped my RS for an LT, but now I miss it.
My LT is in great condition, hence, I'm now considering this as an option. |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Wed Feb 10, 2016 1:07 pm Post subject: |
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Pretty much none.
The LT also has slightly different main frame geometry.
Is it possible? Probably with some effort but if I wanted to go back to an RS from an LT I'd just sell the LT when I found a good RS that I wanted to buy.
If you wanted to go full LT>RS conversion then you'd also need to replace the wheels, front brake lines and front fender.
And handlebars/dashpad.
There also might be some minor mods to wire up the fuel and temp gauges.
_________________
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)
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bikesnbones
Big Brick Rider
Joined: 03 Aug 2014
Posts: 74
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| Posted: Wed Feb 17, 2016 8:51 pm Post subject: |
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| Flying Duck wrote: | Pretty much none.
The LT also has slightly different main frame geometry.. |
Been investigating, and it seems that the LT and RS share the same frame with no differences, which also goes for everything else except the body work and supporting frames.
| Flying Duck wrote: | If you wanted to go full LT>RS conversion then you'd also need to replace the wheels, front brake lines and front fender.
And handlebars/dashpad.
There also might be some minor mods to wire up the fuel and temp gauges. |
Someone in my bikes past already fitted the RS wheels.
Of course everything else you say goes without saying.
What I wanted to know, is if the fairing support subframe is the same, but it isn't.
Interestingly, my BMW dealer have a customer who converted his RS to an LT.
I'm hoping to get in touch with him soon.
You never know, he may have kept all the parts.
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Wed Feb 17, 2016 10:21 pm Post subject: |
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Don't know what research you did but the frames are not the same. They even have different part numbers which is your first clue that they are not the same.
The main fairing brackets are completely different. On LT the main fairing bracket also holds the instrument cluster in one place that does not turn with the front forks. On an RS the cluster mounts to the upper fork tree and turns with the handlebars.
The other parts for mounting parts for the body parts are different as well.
The side panels are different too.
The tail cowl and seat mounting parts are the same though.
_________________
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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Scott_Anderson
Site Admin
Joined: 05 Sep 2006
Posts: 3122
Location: Central Iowa, USA
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| Posted: Wed Feb 17, 2016 11:19 pm Post subject: |
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I was going to say also that the LT has the swing out lift handle that the RS does not have...minor, but still a difference.
_________________
Ride safe.
1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold) |
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bikesnbones
Big Brick Rider
Joined: 03 Aug 2014
Posts: 74
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| Posted: Thu Feb 18, 2016 7:32 pm Post subject: |
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| Flying Duck wrote: | | Don't know what research you did but the frames are not the same. |
They are in fact the same frames, but with slight differences, to accommodate the different clock arrangement, hence the different part numbers.
I'm informed by my local BMW dealer, that one of their customers did a successful RS to LT conversion, with very little trouble.
They're going to put me in touch with him.
You said earlier;
| Flying Duck wrote: | | The LT also has slightly different main frame geometry. |
Could you elaborate on that, |
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bikesnbones
Big Brick Rider
Joined: 03 Aug 2014
Posts: 74
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Thu Feb 18, 2016 10:23 pm Post subject: |
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I do not know the details of the differences. I do know the LT rides higher but I think most of that is due to the spacers between the center stand bracket and trans.
I haven't owned one in many years but I think you're right that the K100RS4V (if you look at the valve cover that's what BMW calls it, not a 16V - not that it matters to me, just yanking your chain) has a handle and the frame handle came in with the release of the K11RS.
As I stated in my initial response, I'm pretty sure that it is possible, I just don't think it's worth the time/money/effort.
I'd rather be riding than wrenching. (Although I'm sure many here don't believe me when I make that statement. )
_________________
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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SugarHillCTD
Site Admin
Joined: 10 Oct 2007
Posts: 4238
Location: Now in Eastern Pennsylvania
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| Posted: Fri Feb 19, 2016 5:31 am Post subject: |
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Again a minor point in this discussion, but my Canadian spec K100RS4V does have that swingout handle.
Oddly enough from what I have seen on the bikes and on the Max fiche, the '90 through '92 RS are the only models (RS or LT) that have a steering damper. Maybe Drake can verify this.
I have owned and done work on a '94 RS, a '93 RS and now the '92 RS but never having worked on an LT that is the limit of my input
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John & Cathy
'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F. |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Fri Feb 19, 2016 8:51 am Post subject: |
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JMHO but the steering damper on the 4VRS is just extra weight and adds no value. Though the K11RS has the same mounts for it, BMW got rid of it when they went from the K100RS4V to the K11RS, with essentially the same frame geometry.
I have never gotten near a tank-slapper on any of my K11s. Despite several hundred thousand K miles, the only one I ever had was on my K75RT, and I attribute that to a combination of some very unique wet riding conditions and rider error.
And trust me, you do not ever want to experience a tank-slapper on any bike at 60 MPH. Mine only lasted about 4-5 cycles and was over before I could react (aside from letting the brakes off out of instinct) but being out of control at that speed on a motorcycle is frickin scary. 
_________________
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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bikesnbones
Big Brick Rider
Joined: 03 Aug 2014
Posts: 74
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| Posted: Fri Feb 19, 2016 1:39 pm Post subject: |
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| Flying Duck wrote: |
As I stated in my initial response, I'm pretty sure that it is possible, I just don't think it's worth the time/money/effort.
I'd rather be riding than wrenching. (Although I'm sure many here don't believe me when I make that statement.) |
I do agree, but decent K's are like hens teeth here in the UK, and if you want an exceptional one, you're going to pay a very high price.
I'm lucky, in that my LT is an exceptional example, and I got it privately for a very good price.
To get something close to it in terms of condition NOW, is going to cost me a lot.
I guess I got this stupid idea into my head, that if I got all the necessary parts, I could have two bikes in one, for just a few hours spannering.
I have the RS wheels already fitted, and the lines wouldn't need to be lengthened.
I'd have it in RS format for most of the time, but then convert it to LT spec for the once every two years I go touring.
Nice idea in theory I guess.
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Number 6
Flying Brick Rider
Joined: 05 Feb 2011
Posts: 481
Location: Paris area, France
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| Posted: Wed May 25, 2016 11:02 am Post subject: |
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Same frame, just need to swap parts, not only fairing, also handlebar, cables and lines.
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I am not a number, I am a free man.
94 K1100LT |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Wed May 25, 2016 10:43 pm Post subject: |
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It's not the same frame. As noted earlier, on the RS part of the frame is the lift handle. On the LT it's a swing out lift handle like 2V Ks.
You can see the lift handle as part of the RS frame in this eBay listing.
http://www.ebay.com/itm/96-BMW-K1100RS-K1100-1100-FRAME-CHASSIS-/190855077097
_________________
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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bikesnbones
Big Brick Rider
Joined: 03 Aug 2014
Posts: 74
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Sat Jun 11, 2016 9:34 pm Post subject: |
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That's a K100RS 4V, not a K1100RS. I have owned two K1004Vs and three K1100RSs. All of the K100RS4Vs had pull out lift handles, none of the K1100RS bikes have had a pull out lift handle.
Here's a pic of one of my 93 K1100RSs:
_________________
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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bikesnbones
Big Brick Rider
Joined: 03 Aug 2014
Posts: 74
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| Posted: Mon Jun 13, 2016 5:22 am Post subject: |
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The only difference between the K100 16V, and the K1100RS, is the extra 100cc.
In every other respect, both are the same bike, WITH IDENTICAL FRAMES, and as we see, the K100RS 16V does indeed have the lift out handle.
I don't doubt that BMW ditched the lift out handle for the later 1100RS, and left it on the LT, as it was probably slightly more expensive, and only really made sense on the touring bike.
Anyway
If I am wrong, please explain the differences between the frame on the K100RS 16v as linked by me, and the K1100LT.
In the meantime, here's a video detailing the differences between the German and American K100RS 16v
You can clearly see that the German spec one, is actually identical to the K1100RS.
NO DIFFERENCE WHATSOEVER, apart from the extra 100cc.
Both have the lift out handle you'll notice.
https://www.youtube.com/watch?v=MA6G3vISetI |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Mon Jun 13, 2016 2:41 pm Post subject: |
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The frames are not identical. Does the fact that they have a different part number maybe give you a clue?
By the way, have you ever seen a K100RS4V (BTW, it's 4V, not 16V - you can tell by reading the valve cover) that does not have an upper central frame member under the tank but instead has a "V" configuration?
Here's what a K1100RS frame looks like:
That's hardly "identical" to a K100RS4V frame.
_________________
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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bikesnbones
Big Brick Rider
Joined: 03 Aug 2014
Posts: 74
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| Posted: Mon Jun 13, 2016 3:03 pm Post subject: |
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| Flying Duck wrote: | | The frames are not identical. Does the fact that they have a different part number maybe give you a clue?: |
Interesting, what are the part numbers
| Flying Duck wrote: | | By the way, have you ever seen a K100RS4V (BTW, it's 4V, not 16V - : |
I think you're being pedantic.
It's a 4v per cylinder,
4 X 4 = 16
It's a 16 valve engine, as opposed to 8 valve in the older model.
| Flying Duck wrote: | Here's what a K1100RS frame looks like:
That's hardly "identical" to a K100RS4V frame. |
No there is a slight redesign to the headstock brace, I'll give you that but it is identical to the LT frame, which brings me nicely back to my point, which was that the LT and RS frames are identical.
Here's an LT frame.
Tell me the difference
Look forward to that
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Mon Jun 13, 2016 3:08 pm Post subject: |
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Except for all of the differences and different part numbers, they're identical. Got it.
I guess for you siblings of the same parents are identical twins.
_________________
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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Scott_Anderson
Site Admin
Joined: 05 Sep 2006
Posts: 3122
Location: Central Iowa, USA
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| Posted: Mon Jun 13, 2016 7:23 pm Post subject: |
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That pinwall picture sure don't look like an LT frame to me.... where's the lift out handle... just saying.
I see the fixed, frame lift point.
_________________
Ride safe.
1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold) |
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