K11 Owners Group

yhog · Posted: Fri May 14, 2010 9:01 am Post subject: Ex pipe cruck

Hi Guys,
I've heard Ex pipe of K1100(LT/RS) crucked in couple friends of mine. Most of them already run near 100000km also all of their model are ABS1.
http://keihin-journal.com/forum/download/file.php?id=1873&t=1&sid=26344baa3ce30355e4f00e4131e3c4b5
http://keihin-journal.com/forum/download/file.php?id=1872&t=1&sid=26344baa3ce30355e4f00e4131e3c4b5

Anybody has like these experience and how to fix this.

Ted · Posted: Fri May 14, 2010 9:33 am Post subject:

This is one of the more common failure points on the K11, given that it is still pretty rare. I never had a crack but I believe people that have simply replace with aftermarket or get them re-welded.

I made it a habit of re torquing the header bolts at every oil change as they have a bad habit of loosening up and causing stress further down the exhaust.
_________________

Ted

KOG#1

tmarshall57 · Posted: Fri May 14, 2010 10:33 am Post subject:

Mine was cracked on two of the downpipes at only 36,000 miles. Got it welded/brazed locally.

I do suspect that some of the jigs on which these exhausts were built were not 100% accurately engineered
_________________
K1100RS Special Edition 1997
Arctic Silver/Black

yhog · Posted: Fri May 14, 2010 7:50 pm Post subject: Thanks

Yha ! I suspect the reasons of crack might loosen Ex stud bolts. But I wonder why never heard ABS2 model happened like this crack. Some staff of BMW Japan said there are something different between ABS1 and ABS2. Crying or Very sad

Flying Duck · Posted: Fri May 14, 2010 8:14 pm Post subject:

The only real difference is the ABS. However, because of that they redesigned the junk under the seat and got rid of the ignition amp. They also changed the wiring harness and the instrument cluster to accommodate the ABS-associated changes.
_________________
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

Ted · Posted: Fri May 14, 2010 9:29 pm Post subject:

Didn't they also change some mounts also when they did the ABS switch between the '93 and '94 years?
_________________

Ted

KOG#1

Tim (Midland Section) · Posted: Sun May 16, 2010 5:38 pm Post subject:

If you decide to get it welded, may I suggest you change the silencer (muffler) support rubber. I read somewhere that it is that rubber which hardens & may cause the cracked pipe.
HTH
_________________
Regards Tim,

Grey haired riders don't get that way by pure luck
1996 Guzzi Cali3 LAPD
1972 750 Commando
G6HRN
#485

yhog · Posted: Mon May 17, 2010 7:56 pm Post subject: I suspected too

Thank you Tim Very Happy

I also suspected vibration of mount rubber might cause of crack pipe.
I did not know exactly the material of rubber between ABS1 and ABS2 might different.
Anyone knows about this ?

Flying Duck · Posted: Mon May 17, 2010 10:23 pm Post subject:

Exact same exhaust hanger. I'll bet if you searched here you'd find ABS II bikes with cracks at the collector.
_________________
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

tmarshall57 · Posted: Thu May 20, 2010 5:32 pm Post subject:

whyoldbill · Posted: Thu May 20, 2010 6:33 pm Post subject: