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Old Jun 23rd, 2008, 9:34 pm
script56 script56 is offline
Join Date: Jun 2008
Location: oak ridge, tn, USA
Posts: 2
85 k100rs aftermarket exhaust

I was wanting to get an aftermarket exhaust for my k100, but the one on the MAC performance website says it only fits 1986 models and up...

If these dont fit, then does anyone know where an aftermarket for an 85 is?

Also if there is a difference between an 85 and an 86, what is it? my 85 is a 4 to 1 header to muffler system.

Will this fit the 85? Link below...


here is another one i was wondering if it would fit...

http://cgi.ebay.com/ebaymotors/86-B... spagenameZWD1V
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Old Jun 24th, 2008, 7:48 pm
duckbubbles duckbubbles is offline
Senior Member
Join Date: Sep 2006
Location: Austin, Texas, USA
Posts: 175
The main differences between the different year models of K-bike exhaust are the way the muffler mounts to the back end of the left footpeg bracket. It is possible to fabricate a mount that will work with just about any muffler hanger. I did this several years ago and it worked ok.

Remus makes a system that will fit the different year models. I have had one for several years now with their quietest muffler and it is acceptable. I would rather have the quiet of the stocker, but finally gave up with the cracking.

I ended up with the muffler hanger from the K100/K1100 (16 valve models) that uses the rear two mount bolts of the footpeg bracket. It is stout and rubber donut equipped. Get the pipe that will fit those bikes and you are in business.

'16 R1200RS
'85 K100/1100RS, 30 yrs. 325,000 miles
'05 R1200ST, 8 yrs. 57,400 miles-3rd deer killed it.
'11 R1200RT, 2 yrs. 30,000 mi. (gone)
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Old Jun 25th, 2008, 2:33 pm
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Beemer01 Beemer01 is offline
Join Date: Sep 2006
Location: Lake Forest, Il, USA
Posts: 350

I have a Kerker slip on on my 1985 K100RS. A lot lighter than stock (1/4 the weight?) and works well. I, however would prefer the quiet of the stock system, especially with my neighbors being lawyers and all.

If you want to swap, let me know. My Kerker is all aluminum and in fine condition.

"What follows is based on actual occurrences. Although much has been changed for rhetorical purposes, it must be regarded in its essence as fact. However, it should in no way be associated with that great body of factual information relating to orthodox Zen Buddhist practice. It's not very factual on motorcycles, either."

Robert Persig - Zen and the Art of Motorcycle Maintenance

1985 K100RS (Sold)
2000 323i (Sold)
2003 1150GS (Sold)
2009 528Xi
2004 K1200GT
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Old Jun 25th, 2008, 6:13 pm
script56 script56 is offline
Join Date: Jun 2008
Location: oak ridge, tn, USA
Posts: 2
I sent you an email
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