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1Back to top Go down   Modified Aftermarket Exhaust Sound Empty Modified Aftermarket Exhaust Sound on Sun Nov 12, 2017 9:35 am

DBRMN

DBRMN
Platinum member
Platinum member
I've been looking around the K100 Forum to find a thread for after market exhausts for K100's but didn't find much. I want to get rid of the whirly sounding exhaust from a K100 and have more of an S1000RR sound. I know that they are both inline 4's and are both 4 stroke however I also know that they might have different timings making different sounds, but theoretically if the right aftermarket exhaust was selected would it be possible to get my K bike sounding like a BMW S1000RR?? If so which aftermarket exhaust. Im not too worried about noise level or emissions or performance effects.

Thanks 
DBRMN

https://www.gofundme.com/manage/helping-fund-my-motorbike-projec
    

2Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Sun Nov 12, 2017 11:29 am

Laitch

Laitch
Life time member
Life time member
@DBRMN wrote: theoretically if the right aftermarket exhaust was selected would it be possible to get my K bike sounding like a BMW S1000RR?? If so which aftermarket exhaust. Im not too worried about noise level or emissions or performance effects.
You could buy a £900 Akrapovic exhaust, or you could select from one of the manufacturers of these noisemakers. Smile


__________________________________________________
1995 K75T 68,000 miles
Modified Aftermarket Exhaust Sound Usa-lo10
    

3Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Mon Nov 13, 2017 12:13 pm

boostd4

boostd4
Silver member
Silver member
There are a lot of sound clips on youtube.  Especially from cafe4racer.  That would be your best bet.

This one was the one I liked the best - most like a modern sportbike sound:  https://www.youtube.com/watch?v=IpVdT1SukEE

I ended going up with their right side thunder slash which is much more raw sounding, but I wanted my exhaust on the other side to show off the floating wheel.

    

4Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Mon Nov 13, 2017 1:01 pm

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
@Laitch wrote:
@DBRMN wrote: theoretically if the right aftermarket exhaust was selected would it be possible to get my K bike sounding like a BMW S1000RR?? If so which aftermarket exhaust. Im not too worried about noise level or emissions or performance effects.
You could buy a £900 Akrapovic exhaust, or you could select from one of the manufacturers of these noisemakers. Smile

Wow....my K100s cost me less than that........and they came with exhausts. Not just any exhausts either, but genuine BMW ones.

Not too long ago I got offered a 29 litre K petrol tank for the RT, from the US.....then added cost of shipping, import tax, VAT, painting etc and it added up to a huge amount or money. So I decided to buy a prepainted 22 litre tank instead, but it came with a complete K1100LT attached to it and some spares like new tyre, brake pads, Clymer and spare wheel hanging off the end of it.

Even better, it cracked a header and now sounds like a Harley. No £900 spent for that.

As for the S100RR, my brother has one I can ride anytime I feel the urge. So far I haven't felt the urge.

But....I do love some of those accessories out here.....


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

5Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Mon Nov 13, 2017 2:25 pm

BobT

BobT
Life time member
Life time member
@92KK 84WW Olaf wrote:
@Laitch wrote:
@DBRMN wrote: theoretically if the right aftermarket exhaust was selected would it be possible to get my K bike sounding like a BMW S1000RR?? If so which aftermarket exhaust. Im not too worried about noise level or emissions or performance effects.
You could buy a £900 Akrapovic exhaust, or you could select from one of the manufacturers of these noisemakers. Smile

Wow....my K100s cost me less than that........and they came with exhausts. Not just any exhausts either, but genuine BMW ones.

Not too long ago I got offered a 29 litre K petrol tank for the RT, from the US.....then added cost of shipping, import tax, VAT, painting etc and it added up to a huge amount or money. So I decided to buy a prepainted 22 litre tank instead, but it came with a complete K1100LT attached to it and some spares like new tyre, brake pads, Clymer and spare wheel hanging off the end of it.

Even better, it cracked a header and now sounds like a Harley. No £900 spent for that.

As for the S100RR, my brother has one I can ride anytime I feel the urge. So far I haven't felt the urge.

But....I do love some of those accessories out here.....
So to sum it up Olaf, did the bigger fuel tank make the same sound as the exhaust that the OP wants?

    

6Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Mon Nov 13, 2017 3:44 pm

chris846

chris846
Life time member
Life time member
New member here just browsing the forums, so hi. 

Not wanting to go off topic, but Olaf's contribution reminds me of a 'helpful' post I once read giving advice to someone who wanted to pep up their boxer:
"remove the large complex part attached to the rear wheel dustcap, and replace it with the equivalent item from a Ducati..."

    

7Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Mon Nov 13, 2017 4:05 pm

jbt

jbt
Silver member
Silver member
No way you'll get an S1000RR sound with a K100 engine.
2 valves vs 4 valve per cylinder
different timing
different stroke/bore ratio
different inertia
different diameters, sections and junctions in the exhaust sytem
different engine disposition that determines a particular design for K100 pipes that are not the same lenght

The only thing you'll get is looking like a bum twho wants to make me believe he has an S1000RR with it's noisy K100...
and who thinks that noise = power. Did you heard something about harmonics and pressure regulation in an exhaust? Any mod of the exhaust will degrade your engine performance.

    

8Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Mon Nov 13, 2017 4:29 pm

88

88
Life time member
Life time member
I picked up a Remus and it sonuds nice on my K1100RS - bit of Bark but a K sounds like a K !!  roundel


__________________________________________________
Modified Aftermarket Exhaust Sound Ir-log1188....May contain nuts!Modified Aftermarket Exhaust Sound Ir-log11

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

9Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Mon Nov 13, 2017 9:54 pm

Holister

Holister
Life time member
Life time member


__________________________________________________
1988 K100RT     VIN No.  0094680
1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
 Modified Aftermarket Exhaust Sound Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

10Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Tue Nov 14, 2017 4:04 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
@BobT wrote:
@92KK 84WW Olaf wrote:
@Laitch wrote:
You could buy a £900 Akrapovic exhaust, or you could select from one of the manufacturers of these noisemakers. Smile

Wow....my K100s cost me less than that........and they came with exhausts. Not just any exhausts either, but genuine BMW ones.

Not too long ago I got offered a 29 litre K petrol tank for the RT, from the US.....then added cost of shipping, import tax, VAT, painting etc and it added up to a huge amount or money. So I decided to buy a prepainted 22 litre tank instead, but it came with a complete K1100LT attached to it and some spares like new tyre, brake pads, Clymer and spare wheel hanging off the end of it.

Even better, it cracked a header and now sounds like a Harley. No £900 spent for that.

As for the S100RR, my brother has one I can ride anytime I feel the urge. So far I haven't felt the urge.

But....I do love some of those accessories out here.....
So to sum it up Olaf, did the bigger fuel tank make the same sound as the exhaust that the OP wants?

Absolutely no idea about the sound Bob, but the K1100 that's attached to it is bloody nice!!

A good exhaust note is also defined by the engine configuration. Like a V6 against a straight 6 will never sound the same, doubt even a 2v as against a 4v head sound the same. Ks top out about 8,500rpm, the S1000RR goes on a long way past that.

But yes the Akra exhausts do sound nice.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

11Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 5:13 am

Saxon7

Saxon7
Life time member
Life time member
I'm quite partial to a bit of noise myself. :-) regardless of whether I get more horsepower, though a little more mid range might be nice.
As said, a K100 will never sound like a flash new one but that doesn't mean you can't make them sound crisp. Modified Aftermarket Exhaust Sound 447221
I'm interested in looking at a collector so I can put a slip on pipe on mine. Any ideas?

    

12Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 5:24 am

charlie99

charlie99
VIP
VIP
@chris846 wrote:New member here just browsing the forums, so hi. 

Not wanting to go off topic, but Olaf's contribution reminds me of a 'helpful' post I once read giving advice to someone who wanted to pep up their boxer:
"remove the large complex part attached to the rear wheel dustcap, and replace it with the equivalent item from a Ducati..."



nearly fell off ma chair again chris ...thanks for the belly flutter after a really weary day ...I needed that


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OModified Aftermarket Exhaust Sound Au-log10
    

13Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 5:38 am

charlie99

charlie99
VIP
VIP
seani I saw a really good  shaped collector , more the likes of a proper designed one, with the length and mould of the collector falling into the correct race type design rules , Plus the flanges required to fit standard pipes with clamps rather than interference , and spring loaded jobies  on the facebook pages recently , italian and fairly well priced I must say ... cant find the link at the moment ...but will look again when my head clears and back pain subsides
its really a pity that we cant get more even length header pipes before the collector to take the best advantage of the configuration of the engine .

I will be working on this ...yes its a dream, but I recon can be achieved ..pity bert 2 is no longer active here , I think he has quite a collection of k bikes now .and would love to try and support him into some new development ...but  well its hard being me at the best of times giggle


cheers mate


50mm outlet  would have wished for 40 or so

Modified Aftermarket Exhaust Sound 26230110



Last edited by charlie99 on Fri Jan 12, 2018 7:10 am; edited 1 time in total


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OModified Aftermarket Exhaust Sound Au-log10
    

14Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 6:37 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Early this week I picked up 2 boxes........................with a shiny nice new full Remus system in it. No idea yet how this will sound but looking forward to getting it on the K1100LT.

Someone in UK put it up at a bargain basement price so I was happy. Think I got the last one too.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

15Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 7:08 am

charlie99

charlie99
VIP
VIP
pics please Olaf...when you get time


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OModified Aftermarket Exhaust Sound Au-log10
    

16Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 8:43 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
And I now just got a message to say I now have a full set of studs nuts and washers......mmmmmm

How easy or hard is it to get the old one off? The K100RT was no problem, all came out as they should but the K1100 has different mountings. Later K1100 with the ABS by the battery.

I went for this because the headers did their usual cracking and two of them are fully separated from the exhaust. I realised with the amount of use this was going to be an ongoing problem of welding from time to time and replacing mounts/bushings as service items. I wasn't looking for noise or performance increase, just to solve a problem and prevent a reoccurrence.

My initial intention was to go for a collector and a slip on pipe but the Remus popped up for much less money and no 'it might fit' bits involved. When I looked at a used one from James Sherlock and added the mountings and so on and the cracking issues would remain, the Remus worked out about €100 more. The BMW one will be welded up and polished and put in the shed.

A few sunny days on a patio are great for polishing exhausts. I use wet and dry for it, the 'wet' comes in little green bottles and a little over 4% active ingredient is about right.

Being fussy the Remus headers are not polished to mirror finish but are well finished....will go at that too before putting it on as there seems to be a surplus stock of wet and dry after Christmas. Just makes it easier to keep them clean. Purists will probably say matt is better for heat dissipation.....there is a place for them too......


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

17Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 3:03 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
@DBRMN wrote:I've been looking around the K100 Forum to find a thread for after market exhausts for K100's but didn't find much. I want to get rid of the whirly sounding exhaust from a K100 and have more of an S1000RR sound. I know that they are both inline 4's and are both 4 stroke however I also know that they might have different timings making different sounds, but theoretically if the right aftermarket exhaust was selected would it be possible to get my K bike sounding like a BMW S1000RR?? If so which aftermarket exhaust. Im not too worried about noise level or emissions or performance effects.
Thanks 
DBRMN
Try this link from a few years ago concerning a custom collector which fits K100. It can help open up an exhausting new world of muffling possibilities (couldn't resist).

K100 collector


__________________________________________________

1987 K100RS, '89 K100 w/K1100RS engine, '93 Framed K11/K12 engine 'Big Block', '96 K1100RS, '09 K1300GT, '07 K1200R, '95 R100 Mystic & '77 R75/7.

    

18Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 3:16 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I just cleaned up the exhaust for my K100RS 16V which by the way is a stock exhaust for early K100's.  It went on with a bit of fiddling with the mount, but works quite well.  I had a remus exhaust, but removed it because it embarrassed me when riding through nice neighborhoods, actually almost everywhere I rode in public.

Anyway, I cleaned mine by washing well and drying.  Then I put a good coat of Naval Jelly and left it for about an hour, applying a bit every now and then to keep it wet.  Then I used the Naval Jelly as the wet for 2500 wet ot dry.  About an hour or so for the header pipes and a half hour for the can.  I probably could have done the headers faster if I had disassembled them.

Results are quite nice.


__________________________________________________
Present:
1994 K75RT
1991 K100RS

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

19Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 4:03 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Of course, there's this one that Smitty fitted a while back... A quick forum search reveals a whole heap of interesting stuff. I'll often exhaust that possibility before asking a question that's likely had a fair few hits in the past.

Zorst



Last edited by Two Wheels Better on Sat Jan 13, 2018 2:05 pm; edited 1 time in total


__________________________________________________

1987 K100RS, '89 K100 w/K1100RS engine, '93 Framed K11/K12 engine 'Big Block', '96 K1100RS, '09 K1300GT, '07 K1200R, '95 R100 Mystic & '77 R75/7.

    

20Back to top Go down   Modified Aftermarket Exhaust Sound Empty Re: Modified Aftermarket Exhaust Sound on Fri Jan 12, 2018 5:43 pm

Saxon7

Saxon7
Life time member
Life time member
Charlie, you're a gem mate! Hehe.
I just sent Malcolm in NZ an email to see if he's still in the business of making those collectors he does, TWB. Be interesting to find out.
Charlie, yes it's a shame Bert2.0 isn't more active.
I went for a ride with Smithy the other day and his Zorst looks and sounds really well. Not too loud, but with a rorty note.

    

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