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1Back to top Go down   Exhaust interchangability  Empty Exhaust interchangability on Mon Apr 30, 2012 10:06 am

PureRockFury

PureRockFury
New member
New member
Hello,

Either my google-fu is lacking, or there simply doesn't seem be much information regarding K100 exhasut interchangibilty. Perhaps it's because it's a simple question; but I am new to BMW bikes.



Is there any difference over the years/packages regarding exhasut fitment? For example, would a 1991 K100 RS (16v) system fit a 1985 K100 (8v)?



Any insight greatly appreciated! Thank you.

    

2Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Mon Apr 30, 2012 10:24 am

RicK G

RicK G
VIP
VIP
Yes but the rear mounting is different. Not an insurmountable thing but different


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

3Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Mon Apr 30, 2012 10:26 am

PureRockFury

PureRockFury
New member
New member
So it's just an issue of fabricating a rear mounting bracket? The headers would bolt correctly up at the engine?

    

4Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Mon Apr 30, 2012 10:35 am

RicK G

RicK G
VIP
VIP
You may have some issues with the K100 centre and side stans so use a K1100 one


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

5Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Mon Apr 30, 2012 5:08 pm

Two Wheels Better

Two Wheels Better
Moderator
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Rick is right, and the 'stop tabs' for the stands will be in slightly different places. The headers (spacing, etc) will slot right in, though. That ungainly bulge in an OEM K1100's middle section will occupy the space intended for the older stand, and the rear mount will need fettling, for sure. But nothing about it can't be overcome.


__________________________________________________

Sometimes I lie awake at night, and I ask, "What can I do to keep my life from going by so fast?" Then a voice comes to me that says, "Try slowing down at the corners." 

~Charlie Brown

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-Polizei  - Beemers owned still or sold.

    

6Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Mon Apr 30, 2012 6:54 pm

Inge K.

Inge K.
VIP
VIP
A if you intend to get one, the support on the bulge in the middle section is quite important....be shure you get it with.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

7Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Thu Nov 08, 2012 2:28 pm

Themason

Themason
Platinum member
Platinum member
[quote="Inge K."]A if you intend to get one, the support on the bulge in the middle section is quite important....be shure you get it with.[/quote]

The center stand mount on 16V bikes has a threaded hole into which the rubber isolated rear support screws in. DO NOT omit that mount or the exhaust will very quickly develop cracks where the header pipes are welded to the collector. Once they crack you cannot repair them. I have seen a few older Ks with later 16 valve exhausts and round mufflers. The rear mount can be made to work with minor fabrication.

Consider having a competent welder run a small bead of material, like a little metal thread, between each header pipe 25-50 mm up from the collector. This seems to dampen the buzz that cracks the welds at the collector.


__________________________________________________
I live in a parallel universe but have a vacation home in reality :arrow:

1984 K-100RS Alaska Blue w/Parelever and 16V wheels.

1984 K-100RS Metallic Madison stock

1986 R-80G/S w/1000 cc engine

2007 Harley Davidson Street Rod Mirage Orange w/XR1200 wheels, Race Tech, True Track, Works Performance shocks

2007 Harley Davidson Street Rod Vivid Black stock

1993-ish K-100/1100RT/LT hemaphrodite frankenbike thingy to be painted satin black from a rattle can eventually
    

8Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Thu Nov 08, 2012 3:01 pm

Inge K.

Inge K.
VIP
VIP
@Themason wrote:The center stand mount on 16V bikes has a threaded hole into which the rubber isolated rear support screws in.
It is a L shaped bracket mounted on the rear right bolt to the center stand bridge which is used for this support. (both bracket and rubber support shown at the drawing).

Bracket, part #18 21 1 464 152.

Exhaust interchangability  Braket11


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

9Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Wed May 01, 2013 12:53 am

andyb

andyb
Gold member
Gold member
Been thinking about fitting the K1100 exhaust too. for no other reason then that it looks better. I already have the 1100 stands on.
So if I get the bracket for the stand exhaust mount, what will I need to do to get it to fit up to the Footpeg mount??
anyone done it? pics?

cheers


__________________________________________________
AndyB
'03 K1200GT,

'88 K100 RT
Chassis number: 0097248 ; Vehicle code: 0504; Series: K589
Model: K100RT 84 (0504 (0505) Body Type: K100RT 84 (0504)
Catalog Model: ECE; Engine: (0504); Production: 1988/9
Exhaust interchangability  13763011
    

10Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Wed May 01, 2013 1:10 am

RicK G

RicK G
VIP
VIP
Forget it andy you will be fixing cracks for ever till you have a solid 40kg lump of weld with 4 holes in it. I have had to weld mine 4 times in 13000km and it was falling to bits when I got it


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

11Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Wed May 01, 2013 1:15 am

andyb

andyb
Gold member
Gold member
oh.........................damn. Maybe just a motard muffler, or one of those magaphone units off ebay.
dont see many of the motard mufflers second hand come up.
we can discuss it over a drink Saturday!

drive carefully!


__________________________________________________
AndyB
'03 K1200GT,

'88 K100 RT
Chassis number: 0097248 ; Vehicle code: 0504; Series: K589
Model: K100RT 84 (0504 (0505) Body Type: K100RT 84 (0504)
Catalog Model: ECE; Engine: (0504); Production: 1988/9
Exhaust interchangability  13763011
    

12Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Wed May 01, 2013 1:21 am

RicK G

RicK G
VIP
VIP
I made a collector for the K100 and used a laser can from a kawasaki system and that is what is going back on the K1100 because I found another crack when I removed it yesterday to take the head off.
And it sounds just magic and with the baffle taken out it is just like an R1 in full cry.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

13Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Wed May 01, 2013 2:22 am

andyb

andyb
Gold member
Gold member
Hmmmmmmm, if I go ahead and do it though, what will I need to do to get it to fit the footpeg, anything??
I'll still have the old exhaust system to replace it with if it cracks up.


__________________________________________________
AndyB
'03 K1200GT,

'88 K100 RT
Chassis number: 0097248 ; Vehicle code: 0504; Series: K589
Model: K100RT 84 (0504 (0505) Body Type: K100RT 84 (0504)
Catalog Model: ECE; Engine: (0504); Production: 1988/9
Exhaust interchangability  13763011
    

14Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Wed May 01, 2013 3:28 am

RicK G

RicK G
VIP
VIP
I reckon you would have to fabricate your own mounting. The K1100 has a triangular plate that bolts onto the gearbox where the 2 rear bolts for the footpeg plate bolts on a K100.
The Mufler on the K1100 has 2 6mm bolts holding the bracket to the muffler, you could make a plate to fit there that picks up the bolt on the bottom of the OEM K100 rubber mount.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

15Back to top Go down   Exhaust interchangability  Empty Re: Exhaust interchangability on Wed May 01, 2013 4:27 am

andyb

andyb
Gold member
Gold member
Bugger! you were 'sposed to write "nah it just bolts right on up" !!
Ok, will have to look at this a little closer another week. cheers mate.


__________________________________________________
AndyB
'03 K1200GT,

'88 K100 RT
Chassis number: 0097248 ; Vehicle code: 0504; Series: K589
Model: K100RT 84 (0504 (0505) Body Type: K100RT 84 (0504)
Catalog Model: ECE; Engine: (0504); Production: 1988/9
Exhaust interchangability  13763011
    

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