M4 full system dimensions? - SV650.org

millemille · 05-06-12, 02:50 PM

I've heard from several different sources that the M4 full system for SV is about the best there is for power output.

Has anyone got one, and would you be able to take a few quick measurements for me to help with a custom system I'm building?

Primary length - cylinder to collector?
Secondary length - collector to silencer?
Header diameter?
Collector diameter?

yorkie_chris · 05-06-12, 03:08 PM

Leo is also very good.

andrewsmith · 05-06-12, 03:49 PM

And the Leo is still in production.
Nille has used one as part of a custom system on his curvy

http://forums.sv650.org/showthread.php?t=159142&page=5

yorkie_chris · 05-06-12, 04:00 PM

I have M4 anyway, where are you based? Any particular system of measurement or just best guess of centerline length?

millemille · 05-06-12, 04:07 PM

I'm not looking to buy a system. I'm building a complete system from scratch to suit an under engine mounted silencer, in the manner of a Buell/KTM RC8/Ducati Paninigarlic......

All of the dyno sheets I've seen show the most powerful bikes have M4 systems fitted, whether this is coincidence and the Leo Vince is just as good I don't know, so I'm looking for some simple information to enable me to start doing rough designs of my system.

millemille · 05-06-12, 04:08 PM

Quote:

Originally Posted by yorkie_chris

I have M4 anyway, where are you based? Any particular system of measurement or just best guess of centerline length?

Round the outside radius of the pipework to give the longest dimension would be fine.

Cheers.

yorkie_chris · 05-06-12, 04:09 PM

I can get you that info from my M4, or if you're local you can come and have a proper look yourself.

Also I would email Zoran at TWF racing, he will probably find your project interesting, he will certainly have a leo to take a look at and possibly advise what works and what doesn't. He has dyno data to suggest that an 85ish bhp SV ran best with leo.

millemille · 05-06-12, 04:13 PM

Quote:

Originally Posted by yorkie_chris

I can get you that info from my M4, or if you're local you can come and have a proper look yourself.

I'm down near Brands and if your username has anything to do with your locale and not your favourite chocolate bar (?) I fear we are geographically disadvantaged.

05-06-12, 02:50 PM	#1
millemille Member Join Date: May 2012 Posts: 318	M4 full system dimensions? I've heard from several different sources that the M4 full system for SV is about the best there is for power output. Has anyone got one, and would you be able to take a few quick measurements for me to help with a custom system I'm building? Primary length - cylinder to collector? Secondary length - collector to silencer? Header diameter? Collector diameter?

05-06-12, 03:08 PM	#2
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: M4 full system - anyone got one? Leo is also very good. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

05-06-12, 03:49 PM	#3
andrewsmith Member Mega Poster Join Date: Apr 2010 Location: Newcastle upon Tyne, Just south of salad dodging country Posts: 7,750	Re: M4 full system - anyone got one? And the Leo is still in production. Nille has used one as part of a custom system on his curvy http://forums.sv650.org/showthread.php?t=159142&page=5 __________________ RIP Reeder 20/07/1988 - 21/03/2012. Always missed squire!!! Every year we meet old friends, gain some new ones, lose old ones and you always remember them all. “Live as if you were to die tomorrow. Learn as if you were to live forever.” Mahatma Gandhi

05-06-12, 04:00 PM	#4
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: M4 full system - anyone got one? I have M4 anyway, where are you based? Any particular system of measurement or just best guess of centerline length? __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

05-06-12, 04:07 PM	#5
millemille Member Join Date: May 2012 Posts: 318	Re: M4 full system - anyone got one? I'm not looking to buy a system. I'm building a complete system from scratch to suit an under engine mounted silencer, in the manner of a Buell/KTM RC8/Ducati Paninigarlic...... All of the dyno sheets I've seen show the most powerful bikes have M4 systems fitted, whether this is coincidence and the Leo Vince is just as good I don't know, so I'm looking for some simple information to enable me to start doing rough designs of my system.

05-06-12, 04:09 PM	#7
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: M4 full system - anyone got one? I can get you that info from my M4, or if you're local you can come and have a proper look yourself. Also I would email Zoran at TWF racing, he will probably find your project interesting, he will certainly have a leo to take a look at and possibly advise what works and what doesn't. He has dyno data to suggest that an 85ish bhp SV ran best with leo. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

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