BMW K bikes (Bricks)

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1Back to top Go down   8V exhaust question Empty 8V exhaust question Sun Sep 11, 2016 3:13 am

KiwiK100

KiwiK100
Gold member
Gold member
Hi all, I removed the exhaust header nuts off of my new to me K1 and the header pipe to the #4 pot fell on the ground. I believe broken welds are not that unusual, however, are they repairable? Is it normally the #4 pot or can any of them fail? Gonna be a bit of a bugger to get the weld right round so if anyone has done this or has practical suggestions I would appreciate it.
The stainless cover on the muffler has a ding in it and was wondering if anyone has removed it for repairs? There are two rivets that I guess are what holds this to the can. Any other fastenings as I can't see anything else? Any insight as to what is going on here would be appreciated.
Thanks for your help


__________________________________________________
Current rides:
2020 R1250RS. Metallic black with all the fruit
2002 K1200RS. Owned from new. Pacific Blue, Ohlins, Speiglers, Fiamms, HID. 186,000km SOLD Crying or Very sad
1991 K1. Schwartz metallic black, 18 month frame off restoration. 74,000km SOLD Crying or Very sad
1987 K100RS Style. Black, Ohlins, Race Tech springs, Braided lines. Fully restored. 53,000 miles. SOLD Crying or Very sad
The family history:
1951 AJS 500 single - my Dads ride
1953 Triumph Terrier - my Mum's ride
1916 Triumph Type H, Battle of the Somme, France WW1 - my Grandads ride
    

2Back to top Go down   8V exhaust question Empty Re: 8V exhaust question Sun Sep 11, 2016 5:22 am

klompy the grey brick

klompy the grey brick
VIP
VIP
Hi Kiwi 100...K1 should be 16 Valve and hence a single piece exhaust which has a tendency to crack where the headers attach the collector...anyhow I heard recently that K100 headers which disconnect from the muffler can be used instead.

Good luck.KKlompy


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KKlompy 8V exhaust question 2854237993
"Grace" 1984 K100RS Silver VIN 0019026 Mitt eine Staintune Zorst.
"Olivia" 1997 K1100LT Dark Grey VIN WB1052600W0237453.









Chassis number0019026
Vehicle code0503
SeriesK589
ModelK 100 RS 83 (0502 ( 0503 )
Body typeK 100 RS 83 (0502
Catalog modelECE
Production date1984 / 07
Engine0513)

8V exhaust question Au-log10


    

3Back to top Go down   8V exhaust question Empty Re: 8V exhaust question Sun Sep 11, 2016 8:23 am

Ringfad

Ringfad
Life time member
Life time member
K1's have the same exhaust as K100 16V and also K1100 16v so may be  a good option to look for a spare one.

My k1100 when I got it last year had a loose header pipe (can't recall which one), it had not completely separated.

I brought to a professional stainless welder and he repaired it and after that I did a 3500 km trip round the Nordics :-)

Another option as previously mentioned is to use the separate pipes and silencer from an 8v but being a K1 I assume you want to keep it original.

Note: It is important to replace the rubber mount to stop these pipes cracking.

Good luck with the repair.


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8V exhaust question Ir-log10

   ;BMW; K100RS Style Black 1987 105K Km     ;BMW; K1 Black 1993 60K Km     ;BMW;     K1100LT (Swiss) now a RS     ;BMW; K1 Blue 1990 25K Miles
    

4Back to top Go down   8V exhaust question Empty Re: 8V exhaust question Sun Sep 11, 2016 9:52 am

mike d

avatar
Life time member
Life time member
Some years ago I had the same sort of problem with my K1100 exhaust. Although the pipe wasn't completely disconnected, I made a bracing piece from suitable thick steel plate. This was drilled so that the headers could be bolted to it to maintain alignment. A professional welder who had experience of making exhaust systems for racing cars had no problem welding the pipe back together.

Mike

    

5Back to top Go down   8V exhaust question Empty Re: 8V exhaust question Sun Sep 11, 2016 4:16 pm

KiwiK100

KiwiK100
Gold member
Gold member
Thanks for the advice guys, I made an alignment jig a couple of years back for my K100 4V and kept it (as you do) so this will come in handy again to keep the headers aligned while it is welded


__________________________________________________
Current rides:
2020 R1250RS. Metallic black with all the fruit
2002 K1200RS. Owned from new. Pacific Blue, Ohlins, Speiglers, Fiamms, HID. 186,000km SOLD Crying or Very sad
1991 K1. Schwartz metallic black, 18 month frame off restoration. 74,000km SOLD Crying or Very sad
1987 K100RS Style. Black, Ohlins, Race Tech springs, Braided lines. Fully restored. 53,000 miles. SOLD Crying or Very sad
The family history:
1951 AJS 500 single - my Dads ride
1953 Triumph Terrier - my Mum's ride
1916 Triumph Type H, Battle of the Somme, France WW1 - my Grandads ride
    

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