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Discussion Starter #1
I have a 07/650 recently I saw on youtube a guy who cut the tail end of his muffler off removed the guts and inserted a STAINLESS STEEL MUFFLER # 63-0542-- 2" INLET 3 1/2" OUTLET---17" LONG in to the remainder of his empty can.
Q. Any comments as to pro-cons. I like combustion air flow for mpg and performance and don't mind noise.??????????
DonM
 

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these bikes are pretty well optimised to pass emissions legislation and that means ensuring complete combustion - how much more free breathing do you need beyond 'complete' save your money for something that will engender joy, advantage or the pleasure of giving.;)
 

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Don, I saw the same video. Heed PART of what Norman is saying. Just do it, and engender joy to your ears, and the pleasure of giving that sweet sound to your Burgman. You must understand that Norman is British. I heard the rules are so tough there that if you fart, the Queen's minions will slap a green house gas tax on your arse.
 

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Discussion Starter #4
Myself, being a high performance automotive engineer can see no advantage in exhaust gases going around the maze associated with a design of factory muffler.
In any size dimension of tubing that is within a muffler that is directed to 90 to 180 degree bends is subject to flow restrictions ( choke of sorts).
This is all race proven technology (tuned headers and tuned intake manifolds).
In auto racing the first option and most beneficial investment for more horse power is non restrictive headers... this also equates to more mpg.

My concern would be with the computer mapping curve... would a change in flow alter the mapping curve drastically? I guess this is what I'm after...someone's experience.
No sense re-inventing the wheel.
 

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When I had my 2008 650 Exec., I put a Yoshimura exhaust on it. I disconnected the battery when I started the job, then reattached it when I finished. Started it up and let it idle for 10 minutes. That was supposed to reset the computer. I never had an issue in the 7000 miles I put on after the swap. The bike ran great. Even on my Harleys, I never had an issue changing exhausts as long as I didn't mess with the intake. Is this more of what you are looking for?
 

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Hi yes changing the original exhaust requires a map change to get the most out of the exhaust the ideal thing is change exhaust add hi flow air filter and power commander (to play with mapping) and then have it dyno tuned to get it right
 

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Discussion Starter #7
Thank you for the insight.
I'll follow you're lead and disconnect the electric and let-ur idle for 10 or more.
Time to get out the chop-saw.
 

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The Yoshi site states that remapping is not necessary with their exhaust system. My bike was FAST with the stock air cleaner and mapping. Save your money.
 

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Discussion Starter #10
Mike337, I'd like to hear your point of view. Why noooooooo, have you done it?
Here in California, the cops don't bother with issuing tickets for loud pipes, loud pipes keeps cars from hitting bikers from SUV's driven by Soccer Mon's that are texting.
If I don't like the changes, or have problems, I'll just throw the guts back in and heliarc/tig the can closed.
Question: Has someone on/in the forum done this as I have explained before... that's the guy I want to listen to.
No dis-respect intended to anyone.
 

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Don, I'm ex-tech and an engine development engineer (part-time). My specialisms are oily bits but these days with a heavy leaning to mainly induction and exhaust. I help develop road bike engines and car engines. On these modern road bikes changing the exhaust by cutting up the standard pipe can be detrimental to the performance and economy of the bike. The internal twists and turns in the exhaust system, as you will no doubt know are designed to give the right flow rate over a wide range of throttle, rpm, and load settings, and induce the correct back pressure for the widest range of speed and load ratings. Once you mess with the back pressure you may be disappointed with what you get. Gone are the days when just switching exhausts would make little difference or actually make a positive difference to a road machine. The bikes have to come optimally tuned and there is little the owner can do to improve things for road use. Remember, I'm talking about road use. Racing is something else altogether, as you will again know. However, I've not done that to a Burgman 650 and no one I know has done it. So if you do, let us all know how it goes. Good luck.
 

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My point of view is that I feel the quietness of the Burgman shows its smooth, eloquent style, where as loud I feel is made for in-line bikes that sound good and are meant to be fast. Kinda like putting a header on a Caddy or on a mini van, why?
As far as Hp, you won't find any.
Remember, just my point of view. ; )
 

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Loud pipes keep you about as safe as chaps and a bandana.
 

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If you truly believe that loud pipes save lives, man are you in the wrong place. :D

There numerous older threads about the chopped can , stainless muffler insert. There are even some with before and after sounds on this forum and You Tube. I looked at all of them and seriously considered doing it myself for a while.
The Lardy does not get oppressively loud like a lot of motorcycles doing the chopped can thing, and a little exhaust noise is not all that bad IMHO.

If I were to do it i would go for a complete system change like a Yoshimura , Two Brothers or one of the many that are out there.
 

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Hey Don, I did the A3 conversion & changed back to the stock muffler after 200 miles. It makes the zucki sound too much like a Honda Civic. No gain in performance but was a lot of fun to do for a short time. Sounds really neet under overpasses! Mark
 

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Discussion Starter #17
Anyone bin to the moon on this issue (muffler/exhaust/free flow stuff more mpg/'more hp)more noise??????
Experienced in the field of exhaust for a 650 cc burgman required?
 

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Discussion Starter #18
Okay, nothering to be gained regarding HP/MPG, , I' deal with it.
Thank you

'
Close of thread.
 
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