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Old 04-24-2007, 09:46 PM   #1
Huber Tuber OP
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R1200GS performance exhaust? which pipe

Anyone have any suggestions on good performance exhaust systems. Notice good power increase? Get rid of that back farting on deceleration. Weight savings? Remus? Any advice welcome. I am looking for lighter and more power.. I know "well if you would just search for threads" Well maybe someone new has something to say.

Thanks!
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Old 04-24-2007, 10:09 PM   #2
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Hi,

Pretty much proven that you will get lighter weight and a louder sound with the aftermarket,but no significant performance increase on most BMW's!
Still,I like Remus or Staintune.These seem to be the two most popular.

BMW is selling Akrapovic now,as their aftermarket exhaust of choice.

You may actually get more "farting" with some of the aftermarket units


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Old 04-24-2007, 10:16 PM   #3
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Old 04-24-2007, 11:05 PM   #4
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Any way to get more power out of the ol GS?
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Old 04-25-2007, 12:13 AM   #5
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Quote:
Originally Posted by Huber Tuber
Any way to get more power out of the ol GS?
I have been watching eBay for chip tuning on the 1200GS, but so far nothing doing. They are either still working on something, or simply can't get any more out of the bike by tuning the performance chip. I don't know...
The only other performance enhancement I've seen is complete motor rebuilds with special camshafts, valves, etc. which of course will lower your bike's life expectancy, and maybe your own along with it.
I do notice that the HP2 has 105HP and the HP2 Megamoto has 110HP, compared to the 1200GS's 98. Where they get the extra horses from on those models, I don't know, because the engines seem to be the same as the 1200GS.

Now wasn't that the longest "Dunno" you ever got ??
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Old 04-25-2007, 12:17 AM   #6
st247
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BOS exhausts - http://www.bos-exhausts.com/bmw-eng-pond/index-bmw.html

And Akrapovic exhausts - http://www.akrapovic-exhaust.com/mai...ts-catalog.htm

They're both popular over here and at each end of the cost spectrum with the Akra being the top.

Dyno charts off the websites -

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Old 04-25-2007, 05:28 AM   #7
JimVonBaden
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Which Pipe?

You will get more out of a crack pipe than one for the boxer!

And it will be cheaper too!

Jim
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Old 04-25-2007, 05:31 AM   #8
GB
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Removing the cat and stock exhaust will only make the burping / farting sound louder.. if you want more power, you need to get a different bike.
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Old 04-25-2007, 05:38 AM   #9
Flyboy08
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Quote:
Originally Posted by Gadget Boy
Removing the cat and stock exhaust will only make the burping / farting sound louder.. if you want more power, you need to get a different bike.
So true, as it does on my GS with the Remus....Sounds Koooooooooool
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Old 04-25-2007, 06:19 AM   #10
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In addition to the kewler sound, my Remus full exhaust gives a somewhat better performance over the stock. Seat of the pants feel is a little more Hp, but most of that could simply be due to removing the cat. The major improvement is that accelleration is smoother throughout the rpm range, most noticeably in the lower range. The exhaust definitely farts more on decel. If you only had around $1k to spend on performance farkling, aftermarket shocks will give you the most buck bang on the 12gs. That said, the aftermarket exhaust does provide a bit more fun.
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Old 04-25-2007, 09:02 AM   #11
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I think we need to make a nice thread calling all people that have in fact tuned their 12GS somehow and categorize them. Make a FAQ or something.

From the top of my head we have:

Snorkel modified or not
Performance Controller or not
Blue or K&N filter or not
Aggressive camshaft (Wunderlich Boxer Boost) or not (does anybody HAVE this?)
Light cam buckets or not

New headers:
Acrapovic
BOS
Remus
Wunderlich own (?)
(other?)

Exhausts:
Acrapovic single
Acrapovic twin
BOS
HPE TwinBoost
Hurric
Remus
Sebring
Staintune
WRA Edition (Wunderlich custom)
Zard PowerGun

...anything else?

So maybe create a nice thread to collect those things and get some info?
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Old 04-25-2007, 09:35 AM   #12
JimVonBaden
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Quote:
Originally Posted by NLS
I think we need to make a nice thread calling all people that have in fact tuned their 12GS somehow and categorize them. Make a FAQ or something.

From the top of my head we have:

Snorkel modified or not
Performance Controller or not
Blue or K&N filter or not
Aggressive camshaft (Wunderlich Boxer Boost) or not (does anybody HAVE this?)
Light cam buckets or not

New headers:
Acrapovic
BOS
Remus
Wunderlich own (?)
(other?)

Exhausts:
Acrapovic single
Acrapovic twin
BOS
HPE TwinBoost
Hurric
Remus
Sebring
Staintune
WRA Edition (Wunderlich custom)
Zard PowerGun

...anything else?

So maybe create a nice thread to collect those things and get some info?
More importantly, Dynos for each before and after to show some kind of proof they work, instead of "seat of the pants" dynos which are heavily influenced by how much was spent, and how much the person likes the sound changes!

Otherwise, all these changes have no real validity as performance enhancers. Only what people FEEL, and not necessarily reflecting reality.

Jim

PS And not dyno charts from the manufacturers, as they will always skew reality their way. Independent only!
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Old 04-25-2007, 09:40 AM   #13
dlew
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Quote:
Originally Posted by Bounce
In addition to the kewler sound, my Remus full exhaust gives a somewhat better performance over the stock. Seat of the pants feel is a little more Hp, but most of that could simply be due to removing the cat. The major improvement is that accelleration is smoother throughout the rpm range, most noticeably in the lower range. The exhaust definitely farts more on decel. If you only had around $1k to spend on performance farkling, aftermarket shocks will give you the most buck bang on the 12gs. That said, the aftermarket exhaust does provide a bit more fun.
My experience is the same with Remus header and can plus Blue filter but with the addition of the Wunderlich/Techlusion P.C. it seems even smoother and more powerful AND I am not getting the deceleration popping.

Bike is definitely more fun and I can't help but ride it harder but is using more fuel, needless to say. It's not been dyno tested but the fun meter went up two points.

YMMV, so to speak.





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Old 04-25-2007, 10:25 AM   #14
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Quote:
Originally Posted by JimVonBaden
More importantly, Dynos for each before and after to show some kind of proof they work, instead of "seat of the pants" dynos which are heavily influenced by how much was spent, and how much the person likes the sound changes!

Otherwise, all these changes have no real validity as performance enhancers. Only what people FEEL, and not necessarily reflecting reality.

Jim

PS And not dyno charts from the manufacturers, as they will always skew reality their way. Independent only!
Dyno results are a problem area as far as measuring results go. The variables ( Air temp, Humidity, Operator Experienced or Not etc ) mean that the same bike is quite likley to get different results on different days, or on different dyno's. Manufacturers figures have got a lot better over the last few years, and i'd say they were pretty near these days. One of the bike mags over here dyno'd a 2-1-2 Akrapovic on the 1200gs and it did exactly what Akrapovic said it would. Harris Performance - https://www.harris-performance.com/w...ml&CatalogBody
a well respected builder of Moto GP frames, and runner of a number of WSB and BSB teams are quoting an expected gain of 14 BHP @ 7,760 RPM for the 2-1-2. Doesn't sound too bad too me, untill you work out the to BHP ratio.
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Old 04-25-2007, 10:29 AM   #15
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Akrapovic
BOS
Remus

In that order, if considering performance and weight.
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