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January 26th, 2017, 03:10 AM   #1
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Question In need of SR Racing dual exhaust pipe info, measurements

I have been planning on making a stainless steel dual exhaust for my 650. Mostly for looks, but it would be nice to make it bring some power too. It would use two Akrapovic silencers.

Since the SR Racing dual exhaust has been praised as one of the best aftermarket exhausts, it would be easiest to use same pipe lengths and diameters as it does. Does somebody here own it and could make some quick measurements? Pipe lengths can be somewhat determined from pictures, but diameters are a bit harder. It looks to have at least 2 spots where pipe diameter changes (+ silencer connection probably).

Some help would be appreciated.


Last edited by Jurbeli; January 26th, 2017 at 03:13 AM.
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January 26th, 2017, 09:55 AM   #2
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Hello Finnland, if you really want to do it yourself, I can give some measurements from my exhaust - see post: power gain + blingbling.
Is not an Akra, neither SR. But I trust in MH motorcycles because they do supermoto racing for years. I will dissasemble next 6 weeks, probably...

Ever considered to look after a used one?
Last price for orignal SR was EUR 1.150, which is reasonable. For most of us...
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January 26th, 2017, 01:32 PM   #3
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Yeah, would be great if you can measure it then! I haven't found a second silencer yet so I'm in no hurry.

A custom exhaust would be cheap, also because it doesn't have to be from titanium. I have one Akra silencer already and I'm not sure if it fits aftermarket dual exhausts. My brother will weld it and he has done car exhausts from stainless so I guess it shouldn't be too difficult.

What is the best way to relocate the rear shock reservoir? I would guess the top mount of the shock that attaches to the frame could be cut off and welded on a different angle? Does the shock have to be disassembled for this? Or is there some other way?

Last edited by Jurbeli; January 26th, 2017 at 01:49 PM.
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January 26th, 2017, 02:10 PM   #4
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Originally Posted by Jurbeli View Post

What is the best way to relocate the rear shock reservoir? I would guess the top mount of the shock that attaches to the frame could be cut off and welded on a different angle? Does the shock have to be disassembled for this? Or is there some other way?
Hi Jurbeli,

You might be able to use a KTM EXC shock or at least just the top reservoir from one. I'm not sure which model but maybe the circa 530 has an angled reservoir for clearance. I think it runs a different lower mount though, more like a clevis.

Good luck with it

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January 26th, 2017, 02:53 PM   #5
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I've often thought about doing a dual exhaust and decided that a stock Husaberg muffler from about '06 or '07 paired with a stock KTM muffler of the same vintage would be perfect since they appear to be mirror images of each other.
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January 26th, 2017, 11:01 PM   #6
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various solutions

Most of dual solutions work with modified shock or at least modified reservoir - the later costs EUR 300
see pic original vs SR equipped bike.
Attached Thumbnails
In need of SR Racing dual exhaust pipe info, measurements-fs650c_re_daempfer.jpg   In need of SR Racing dual exhaust pipe info, measurements-fs650e_002.jpg  

Last edited by Bergfest; January 26th, 2017 at 11:04 PM. Reason: various
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January 26th, 2017, 11:09 PM   #7
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more changes

The Rameis guys change place of battery, mine loses battery + starter enginge.
BTW: there is an early double Sebring for sale in germany.
Well I think it is rare and shows a different way:
Attached Thumbnails
In need of SR Racing dual exhaust pipe info, measurements-sebring_doppelrohr.jpg  
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January 27th, 2017, 02:07 AM   #8
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Originally Posted by Damo W View Post
Hi Jurbeli,

You might be able to use a KTM EXC shock or at least just the top reservoir from one. I'm not sure which model but maybe the circa 530 has an angled reservoir for clearance. I think it runs a different lower mount though, more like a clevis.
Thanks for the info, Damo. I noticed that KTM EXC 125 has an angled reservoir too. That is a very popular bike here and complete used shocks can be found cheap. Does anyone know if similar model year reservoir fits Husaberg shock?

Also interested in knowing if it's possible to cut the mount from original shock and weld it in different angle. That would be the easiest way. It is aluminum I guess, but don't know how thick it is and is there something sensitive to heat inside the whole top part of the shock.
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January 27th, 2017, 02:18 AM   #9
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Originally Posted by Bergfest View Post
The Rameis guys change place of battery, mine loses battery + starter enginge.
BTW: there is an early double Sebring for sale in germany.
Well I think it is rare and shows a different way:
That is another possibility. If the shock mod seems too difficult or expensive this might be worth a try. I just guess it would look a bit cleaner if pipes go from different sides. I also have no battery or starter so no need to relocate them. Sebring style the other pipe will be a bit longer too and have two sharp turns if it affects anything.
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January 27th, 2017, 02:30 AM   #10
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Have no clue but how are the fit of a TTX Íhlins for 70 deg bikes? They have complete shock mounted up-side-down. It's not good for sprung weight but you will have the reservoir completely away. Ofcourse it's not the cheapest shock......
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