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Old 10-12-2011, 02:12 PM   #16
TowPro
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Wait, the 2006 F650 has Dual exhaust :) and that's on a single cylinder engine?
so thats OK on a 650 but not the 800?

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Old 10-12-2011, 02:16 PM   #17
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Originally Posted by towpro View Post
Wait, the 2006 F650 has Dual exhaust :) and that's on a single cylinder engine?
so thats OK on a 650 but not the 800?

I believe, and someone will tell me I'm wrong if I am, that one of the exhausts is actually fake.
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Old 10-12-2011, 02:17 PM   #18
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Quote:
Originally Posted by YetiGS View Post
I believe, and someone will tell me I'm wrong if I am, that one of the exhausts is actually fake.
kinda... it does have a cross over line....

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Old 10-12-2011, 02:21 PM   #19
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Originally Posted by Motorfiets View Post
kinda... it does have a cross over line....

Ah. I was going on my recollection of Charley Boorman using the space to store extra water in his Dakar bike. Of course, that bike might have had a custom exhaust...
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Old 10-12-2011, 02:22 PM   #20
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Quote:
Originally Posted by Motorfiets View Post
kinda... it does have a cross over line....

Prime example of the point that two exhausts do not make more power. Seriously, nothing is gained but aesthetics and then only to those that don't see the uselessness of it.
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Old 10-12-2011, 02:58 PM   #21
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One great thing about a single exhausts is that when the bike naps, there is only a 50% chance you will mess up the pipe.
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Old 10-12-2011, 03:03 PM   #22
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One great thing about a single exhausts is that when the bike naps, there is only a 50% chance you will mess up the pipe.
I dunno......



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Old 10-12-2011, 03:10 PM   #23
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Originally Posted by themattreid View Post
Prime example of the point that two exhausts do not make more power. Seriously, nothing is gained but aesthetics and then only to those that don't see the uselessness of it.
Not really true Matt, it does depend on the engine. KTM didn't put a dual exhaust system on the $39,000 690 Rally Replica because they cared about looks, and it doesn't make more power or torque than the F800 either. As it should be on a proper racebike, you can not remove a single component (they do supply blinkers and a license plate holder as you will need them in a rally) and keep the bike working well , and many people have tried in order to shave some more weight. Here is what Rob Pollard, an inmate from OZ who raced the Dakar on his 690 in 2010 - and completed it in the 38th position - had to say:

"Yes i did make a single exhaust for it. I could'nt get the performance out of it . Its a shame becuase it was 6kg lighter than the standard system.But there is a good reason they run twin pipes on them and i've gone back to it."

And yeah, they also look and sound sweet.

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Old 10-12-2011, 08:10 PM   #24
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I would love to make a dual CF pipe for the 8GS.... If someone with welding skills took it from the cat and back..... It would weigh 6 pounds more than the single......



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Old 10-12-2011, 09:10 PM   #25
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Originally Posted by themattreid View Post
Um, a blower increases HP.
So you're saying increasing HP does not constitute an increase in performance

I actually agree that the dual exhaust on THIS motor may not provide much benefit, but if I can add 4 pounds of weight to gain a few extra HP and foot pounds of torque would you not say that I am effectively increasing performance??? Power to weight ratio increase???

And I would still venture a guess that the exhaust pictured is lighter than stock exhaust and provides better flow. The stock can is ridiculous.

Anyway - I've had enough of this nonsense - moving on.
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Old 10-12-2011, 09:40 PM   #26
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While the pictured exhaust might not be so, its also possible to make two cans smaller than one can, tucking them more out of the way.

We have sort of a long term project for an 800 cf exhaust that employs two cans with angular shapes tucked up under the tank hanging from each rail of the subframe. Something very different than a traditional exhaust--sort of in that RXV sense.

Unfortunately, the cf business is sort of on the back burner right now.
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Old 10-12-2011, 10:41 PM   #27
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Originally Posted by YetiGS View Post
Ah. I was going on my recollection of Charley Boorman using the space to store extra water in his Dakar bike. Of course, that bike might have had a custom exhaust...
I'm not sure about the regular 650's, but the one on the Dakar is fake (on the right side, IIRC). So you're not wrong!
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Old 10-13-2011, 07:05 AM   #28
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Originally Posted by bxr140 View Post
While the pictured exhaust might not be so, its also possible to make two cans smaller than one can, tucking them more out of the way.
BINGO


We have sort of a long term project for an 800 cf exhaust that employs two cans with angular shapes tucked up under the tank hanging from each rail of the subframe. Something very different than a traditional exhaust--sort of in that RXV sense.

Unfortunately, the cf business is sort of on the back burner right now.
Bummer.....



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Old 10-13-2011, 08:45 AM   #29
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Originally Posted by dendrophobe View Post
I'm not sure about the regular 650's, but the one on the Dakar is fake (on the right side, IIRC). So you're not wrong!
I was afraid my memory was going.
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Old 10-13-2011, 11:39 AM   #30
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Quote:
Originally Posted by Lounge View Post
So you're saying increasing HP does not constitute an increase in performance

I actually agree that the dual exhaust on THIS motor may not provide much benefit, but if I can add 4 pounds of weight to gain a few extra HP and foot pounds of torque would you not say that I am effectively increasing performance??? Power to weight ratio increase???

And I would still venture a guess that the exhaust pictured is lighter than stock exhaust and provides better flow. The stock can is ridiculous.

Anyway - I've had enough of this nonsense - moving on.
I don't really feel like trying to convince you because it seems you're not understanding a simple concept. I too am tired of discussing it. Not a big deal - I love the look of the dual exhaust, but I won't be modding mine to go that route because it adds nothing but weight over my current arrow headers and leovince pipe.
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