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1Back to top Go down    K1100RS Mirror Glass on Wed Dec 05, 2018 9:57 am

GB777

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I know that the mirror glass has been discontinued by BMW, but i'm trying to find out what type of glass is used in the after markets mirrors.  Is it a flat glass or convex?
On both Motorworks and Motobins websites there is no mention of the glass shape, but both sites use the BMW Part No. 46 63 2 307 640.
I want a convex mirror and not a flat one.  Can anyone help?



Last edited by GB777 on Wed Dec 05, 2018 9:58 am; edited 1 time in total (Reason for editing : correction)


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Gary
'94 K1100RS Mystic Red
•Dyno Tuned to deliver 115 bhp. •Audiovox CC-100 Vacuum Cruise Control. •Fuel Plus Version 3.1 Trip Computer. •R1200c Final Drive Gears (32/13 or 2.54). •Ohlins rear shocky. •K100 Aluminium Radiator fitted. •Davis Craig Thermo Switch fitted to Cooling Fan with manual over-ride. •Fuel Cap drilled and tapped to provide mounting points for accessories, including mini Tank Bag & Garmin 390 Zumo GPS •HID Hi-Lo Headlight and every incandescent bulb on bike replaced with LED's. •Bulb monitoring warning light no longer needed so converted to indicate when Side Stand is down. •LED (Halo) Front Park Light (BMW Car style).
    

2Back to top Go down    Re: K1100RS Mirror Glass on Wed Dec 05, 2018 12:37 pm

Arlina

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It's all flat glass.


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  K1100RS/LT - R1200RT - K100LT 16v - R1100RS (RIP) - Cagiva SST 350 Ala Verde 
    

3Back to top Go down    Re: K1100RS Mirror Glass on Wed Dec 05, 2018 1:27 pm

brickrider2

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I purchased a pair of mirrors on the Germany ebay site a few years back.  The glass was from an after market company and it appeared to be flat.  That was contrary to what had been described so I contacted the seller.  He (she?) responded that it was indeed convex.  I had a closer look and verified that to be true, but it was only ever so slightly convex.


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1996 K1100LT
    

4Back to top Go down    Re: K1100RS Mirror Glass on Wed Dec 05, 2018 4:24 pm

MartinW

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Go to a motor wreckers and buy a couple of convex mirrors larger than what is required. Remove the glasses and take them to a good glazier along with your old mirrors or a cardboard pattern. If he is any good he can cut them to size and finish off the edges. A few inmates have had this done sucessfully.

Regards Martin.


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K75s Hybrid
    

5Back to top Go down    Re: K1100RS Mirror Glass on Wed Dec 05, 2018 5:59 pm

Point-Seven-five

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@MartinW wrote:Go to a motor wreckers and buy a couple of convex mirrors larger than what is required. Remove the glasses and take them to a good glazier along with your old mirrors or a cardboard pattern. If he is any good he can cut them to size and finish off the edges. A few inmates have had this done sucessfully.

Regards Martin.
I had one made that way.  Worked great and only cost $20.


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Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

6Back to top Go down    Re: K1100RS Mirror Glass on Wed Dec 05, 2018 6:31 pm

AL-58

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New glass to stick to your plastic base if your glass is broken
https://www.bmwbayer.de/en/replacement-mirror-glass-spherical-clear-bmw-k-models

Complete new mirror glass with base and clip:
https://www.bmwbayer.de/en/Mirror-glass-pluggd-in-left-and-right-K100RS-K1100RS

I do have some brand new ones(with base and clip) at home which I bought out of a business closedown.  I am willing to part with a couple but not willing to give them away. As the German ones are 88 Euro, I'd be willing to accept $110 with postage included to Brisbane.

They are convex.

Al



Last edited by AL-58 on Wed Dec 05, 2018 6:32 pm; edited 1 time in total (Reason for editing : added info)


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'87 K100RS/HRD sidecar (1100 motor)  sc25 
'92 K100RS-16v (Paint it Black)

'87 K100RT with Paralever backend

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

    

7Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 4:53 pm

Arlina

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Would buy a mirror (€5) and a cutter (€5) take the old mirror from the holder and glue the new one in.
THen buy me €80 fuel to ride Very Happy


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  K1100RS/LT - R1200RT - K100LT 16v - R1100RS (RIP) - Cagiva SST 350 Ala Verde 
    

8Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 5:32 pm

Crazy Frog

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I did tried flat mirrors once and it doesn't work (You cannot get the same angle of view)

What I always want to do is to buy mirrors from a french car and cut them to fit the K100.
This type of mirrors may be the norm all over Europe, but you cannot find them on any car in Canada (I had them on every Renault car that I leased for at least  the last 10 years)
The outside 1/4 of the mirror is really convex and it gives you a good view of a car driving beside you.
The other 3/4 is still convex, but with less of a wide angle view.
There is not cut on the mirror, and it's made in one solid piece.
If you find a car with a mirror big enough to be cut and fitted on the K bike, you will be a happy camper.
And.... if this is from a car with the LED indicator for flashers or "dead angle" view, you could wire it to your flashers and have a friendly reminder that flashers are ON.


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

9Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 6:08 pm

nobbylon

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R1100GS Feb 1995
K100RS July 1989
K100 Dec 1983 
R90s June 1975
R75/6 Feb 1976
F650GD May 2001
    

10Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 6:09 pm

nobbylon

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R1100GS Feb 1995
K100RS July 1989
K100 Dec 1983 
R90s June 1975
R75/6 Feb 1976
F650GD May 2001
    

11Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 6:10 pm

nobbylon

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I used the above company for my k100rs mirror and pleased with it.


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R1100GS Feb 1995
K100RS July 1989
K100 Dec 1983 
R90s June 1975
R75/6 Feb 1976
F650GD May 2001
    

12Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 6:11 pm

Crazy Frog

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I saw them years ago, but the cost was something like 60 euros each. This is a great deal but they are for the RS and not the RT. Crying or Very sad


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

13Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 7:19 pm

RicK G

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@Arlina wrote:It's all flat glass.
You will find that it is flat glass or convex depending which country it was sold in. Mostly it will be convex but occasionally flat then there are some places like Australia where the drivers side is flat and the opposite side convex but this only applies on wide glides tractors, cars and trucks


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"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

14Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 7:36 pm

nobbylon

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R1100GS Feb 1995
K100RS July 1989
K100 Dec 1983 
R90s June 1975
R75/6 Feb 1976
F650GD May 2001
    

15Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 7:39 pm

nobbylon

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R1100GS Feb 1995
K100RS July 1989
K100 Dec 1983 
R90s June 1975
R75/6 Feb 1976
F650GD May 2001
    

16Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 9:08 pm

AL-58

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@Crazy Frog wrote:
I saw them years ago, but the cost was something like 60 euros each. This is a great deal but they are for the RS and not the RT. Crying or Very sad

If you are replacing just the glass the mirror glass is exactly the same shape whether it's an RS or an RT/LT. (Glass with no plastic backing stuck to it)  Buy the glass and stick it your you existing mirror/mirror base

The plastic bases are different between RS  & RT/LT, which is why you can't simply fit an RT Mirror into an RS.

Al


__________________________________________________
'87 K100RS/HRD sidecar (1100 motor)  sc25 
'92 K100RS-16v (Paint it Black)

'87 K100RT with Paralever backend

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

    

17Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 9:10 pm

AL-58

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@RicK G wrote:
@Arlina wrote:It's all flat glass.
You will find that it is flat glass or convex depending which country it was sold in. Mostly it will be convex but occasionally flat then there are some places like Australia where the drivers side is flat and the opposite side convex but this only applies on wide glides tractors, cars and trucks
All of the replacement ones I acquired are convex Rick.

Al


__________________________________________________
'87 K100RS/HRD sidecar (1100 motor)  sc25 
'92 K100RS-16v (Paint it Black)

'87 K100RT with Paralever backend

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

    

18Back to top Go down    Re: K1100RS Mirror Glass on Thu Dec 06, 2018 11:06 pm

Crazy Frog

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@AL-58 wrote:If you are replacing just the glass the mirror glass is exactly the same shape whether it's an RS or an RT/LT. (Glass with no plastic backing stuck to it)  Buy the glass and stick it your you existing mirror/mirror base
Thanks Al.

This is what I was thinking but wasn't sure.
I will order a set. I will be particularly good for the side of the chair (There is a wide angle to cover).


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

19Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 12:18 am

Crazy Frog

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https://www.ebay.de/itm/Ausenspiegel-Spiegelglas-Ersatzglas-Motorrad-Bmw-K1100-RS-Links-oder-Rechts-asph/221746503805?hash=item33a11f207d:g:QG0AAOSwsW9YxuDJ

These are sold as aspherical mirrors.
An aspherical mirror bulges more to one side than the other, creating two zones on the same mirror. The inner zone (the section nearest to the rider) has a nearly perfect spherical shape, while the outer zone (the section farthest from the rider) becomes less and less curved toward the edges. The outer zone of this aspherical design also produces a similar distance and size distortion seen in spherical convex designs.
To make the explanation easier, you can compare this type of mirrors to bifocal glasses.

The best mirrors would be aspheric-convex with a blind spot section.
I cannot figure if the one on Ebay are this style, and cannot see where to ask the question. They could be flat with only the outer section aspherical. Is the line on the mirror marking the separation between the regular part and the blind spot section?

Anybody speaking German would be willing to ask this question to the vendor for me?

Here is the type of mirrors that I am looking for, and the ones on Ebay could very well be this type.


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

20Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 6:44 am

Laitch

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@Crazy Frog wrote:Is the line on the mirror marking the separation between the regular part and the blind spot section?
The details are really within the definition of aspherical and the product's graphic depiction.

The product is being sold as an aspherical (asph in German) mirror. An aspherical vehicle mirror is—as you have described—a convex mirror that has a decreasing radius toward its outer edge to expand its field of view—there is no flat surface. The eBay mirror's surface with the decreasing radius is within the area marked by lines 9, 10, 11 and 12 on the graphic depiction of the mirror in the ad. The eBay mirror should reflect an image of proportions similar to the image on the right hand side of your example. The demarcation line between the two surface areas will likely be faintly visible—also as in your example.

If you can't trust an eBay seller, is there any hope left?  Smile


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1995 K75T 68,000 miles
    

21Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 9:09 am

Crazy Frog

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I sent an Email to the company and already received a reply.
Yes, aspherical, 70% convex with approximately 30% further bend to cover dead angle.

The US Federal Motor Vehicle Safety Standard 111 and the Canada Motor Vehicle Safety Satandard 111 require the driver side mirror to provide "unit magnification", i.e., an undistorted 1:1 reflection achieved with a flat mirror.
This is cannot be achevieve with aspherical mirrors.

This backup Rick G statement:
"You will find that it is flat glass or convex depending which country it was sold in."

To comply with this legislation, some N.A. aftermarket mirrors are approximately 70% flat and only the last 30% is aspherical. This is why I was wondering if the mirrors on Ebay are flat or convex.

US manufacturers like Ford equip some of their vehicles with a split mirror. The small top mirror is aspherical and the bottom one is flat. This is an improvement, but it's distracting when you have to look at 2 physical mirrors at once.

Another flaw in the north American laws is that they do not require the external mirrors to be folded.
ECE Regulation 46 requires that side mirrors be mounted such a way that they swing away when struck by a test cylinder meant to represent a pedestrian.
This is the reason why the K bikes mirrors will "unhook" from the fairing when you hit them.


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

22Back to top Go down    K1100RS Mirror Glass on Fri Dec 07, 2018 9:53 am

norton71

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Easiest solution Bert is simply to ride your bike facing backwards..no need for mirrors at all  then Rolling Eyes

    

23Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 9:55 am

Crazy Frog

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@norton71 wrote:Easiest solution Bert is simply to ride your bike facing backwards..no need for mirrors at all  then Rolling Eyes


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

24Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 10:20 am

Laitch

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@Crazy Frog wrote:I sent an Email to the company and already received a reply.
Yes, aspherical, 70% convex with approximately 30% further bend to cover dead angle.

The US Federal Motor Vehicle Safety Standard 111 and the Canada Motor Vehicle Safety Satandard 111 require the driver side mirror to provide "unit magnification", i.e., an undistorted 1:1 reflection achieved with a flat mirror.
This is cannot be achevieve with aspherical mirrors.
Is it auto rearview mirrors you're interested in replacing? The US federal standard allows either flat or convex mirrors on motorcycles as long as they meet the required dimensions.


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1995 K75T 68,000 miles
    

25Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 10:37 am

Crazy Frog

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@Laitch wrote:Is it auto rearview mirrors you're interested in replacing? The US federal standard allows either flat or convex mirrors on motorcycles as long as they meet the required dimensions.
Yes, the law is different for motorcycles:
Each motorcycle shall have either a mirror of unit magnification with not less than 8065mm of reflective surface, or a convex mirror with not less than 6450 mm of reflective surface and an average radius of curvature not less than 508 mm and not greater than 1524 mm, installed with a stable support, and mounted so that the horizontal center of the reflective surface is at least 279 mm outward of the longitudinal centerline of the motorcycle. The mirror shall be adjustable by tilting in both the horizontal and vertical directions.

An important point is that they are not mentioning anything about aspherical, but only convex.
They also are talking about average radius. Is the aspherical type fitting this requirement?
Why don't we find any aspherical mirrors on car or motorcycles in North America?
It must be a reason.....

BTW, for non NA people, this is the type of dual mirror found on some of the cars in NA (mostly trucks and SUVs)


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

26Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 11:12 am

Laitch

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@Crazy Frog wrote:
@Laitch wrote:Is it auto rearview mirrors you're interested in replacing? The US federal standard allows either flat or convex mirrors on motorcycles as long as they meet the required dimensions.
Yes, the law is different for motorcycles:Is the aspherical type fitting this requirement?
Why don't we find any aspherical mirrors on car or motorcycles in North America?
Yes, aspherical type fits this requirement covering motorcycles. An aspherical mirror is a convex mirror—a type of convex mirror. Why they might not be widely found on motorcycles in the US yet is because this allowance is new regulation developed in the February 2018 federal revision. Passenger cars are still required to have unit magnification outside on the driver's side.


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1995 K75T 68,000 miles
    

27Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 12:03 pm

Crazy Frog

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@Laitch wrote: Why they might not be widely found on motorcycles in the US yet is because this allowance is new regulation developed in the February 2018 federal revision.
like OK, this is very new.
Earlier this year, I was reading an article about US considering allowing convex/aspherical mirrors on driver side (for cars), but I don't think a decision has been taken yet.

Both of my K100 are ECE market and in 1985, they were already fitted with convex mirrors. One was bought in Canada and the other in the US. I am wondering how they got approval with DOT.


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

28Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 1:46 pm

Two Wheels Better

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As an aside to this topic, years ago, when looking up replacement mirror glass for BMW R1100RT models, there'd be two listings with a production date split. One was described as 1100mm and the other as 1400mm. This was obviously not related to the size of the glass. For the R1150RT there was only ever the 1400mm listed. Both "sizes" fit all mirror pods. One was more magnified. By way of interest I note that now only the 1400mm is listed in ETK for both R1100RT & R1150RT. Perhaps a regulatory change influenced that.


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1987 K100RS, '93 Framed K11/K12 engine 'Big Block', '09 K1300GT, '07 K1200R, '04 R1150RT, '95 R100 Mystic, '77 R75/7.
Sniff...can you smell that? I think it might be bullsh*t.

    

29Back to top Go down    Re: K1100RS Mirror Glass on Fri Dec 07, 2018 4:47 pm

Crazy Frog

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@norton71 wrote:Easiest solution Bert is simply to ride your bike facing backwards..no need for mirrors at all  then Rolling Eyes
Message from Santa (or Satan if you're dyslexic) to Norton71:
lol!


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1986 k75, 1985 K100rt, 1985 K100rt/EML sidecar.
    

30Back to top Go down    Mirrror Glass on Sat Dec 08, 2018 1:48 am

norton71

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All things are possible Bert    

https://youtu.be/S4ieJy3qKKc

Note no mirrors  Very Happy
 

    

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