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  #21  
Old 02.07.2015, 15:25
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

I think it should be the max. 80 dB(A) rule.
But is possible that your motorbike may no longer meet some other regulations (power, emission etc.). Or that your brothers exhaust is already to loud and yours is as well.

Or that your brothers exhaust just meets the requirements, and the requirements only. As the noise requirements are very specific.
Try it and you may be astonished what will happen if you reproduce the test procedure.

Here an app that is quite accurate for noise measurements:
https://itunes.apple.com/de/app/nois...518336921?mt=8
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  #22  
Old 02.07.2015, 15:37
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

Noise level depends on the bike model, and year of manufacture first registration.

Also, it's total noise, not just exhaust noise.

Tom
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  #23  
Old 02.07.2015, 15:53
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

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My brother's KTM on its stock pipe is louder than mine with the akra. He had some KTM PowerParts and it was even louder than that. I am talking both at idle and at full throttle. There's no way my bike is louder than his, idle or full throttle. And he is on the stock exhaust at the moment.
KTMs are loud bikes by any standard, I personally love their sound. You are having a restricted bike to 25Kw. How can you even think about comparing the two? Tells me something about how much you know about the subject...
But why not concentrate on the pleasure of driving instead of being there listening and measuring decibels?
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Old 02.07.2015, 16:23
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

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KTMs are loud bikes by any standard, I personally love their sound. You are having a restricted bike to 25Kw. How can you even think about comparing the two? Tells me something about how much you know about the subject...
But why not concentrate on the pleasure of driving instead of being there listening and measuring decibels?
His bike is also restricted to 25kW, so I don't get your point...
You said that if their bike is louder, then it's because "they are giving more throttle". I told you that it's not that case, and that his bike is louder than mine in any case.
I love riding my motorcycle, it's just that I spent 660 chf for this pipe and was expecting it to make the bike sound more aggressive than it is now.... It's just that really . I think that, as it stand, the motorcycle is not loud by any means and could really use some more noise. I am not the kind of guy that goes around like it's Monza revving the s**t out of the bike, I just think that some more noise would surely make it sound better, more aggressive and also safer on the roads.

I am going to try emulating the official test and see the results, I have a db meter at home and could use my phone also.
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  #25  
Old 02.07.2015, 16:43
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

There is no exaust that can make your bike sound like a ... unless your bike is a ... (fill the blanks with any bike manufacturer, KTM, Ducati, MV, what ever.)
You spent CHF 660 to make your bike sound like another and you are disappointed that it was in vain.
This is because some bikes have their peculiar sound: look at Tom's post above, the answer to your questions was there already.
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Old 02.07.2015, 16:57
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

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There is no exaust that can make your bike sound like a ... unless your bike is a ... (fill the blanks with any bike manufacturer, KTM, Ducati, MV, what ever.)
You spent CHF 660 to make your bike sound like another and you are disappointed that it was in vain.
This is because some bikes have their peculiar sound: look at Tom's post above, the answer to your questions was there already.
What? I never said that I would have wanted my bike to sound like a KTM. I am not that stupid, I know that various engine types make different kind of noises. I said that I bought that exhaust to make the sound more aggressive (let's say deeper and louder?). An akrapovic slip on without db killer is deeper and louder. That's all I wanted. My question, from the start, was if there was any way to certify the exhaust without this db killer. I don't know why we are talking about this, I just asked if anyone had already tried certifying some exhaust without its db killer.
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Old 02.07.2015, 17:40
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

You do realize that they check exhausts at roadsides stops with a flashlight and stick to check for baffles, don't you?

No DB-Killer, no baffles. No Baffles, big ticket, and need to show it at Camorino (unless you meet a nice cop that lets you go with just the ticket after you promise to put the DB-Killers in as soon as you get home).

Tom
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Old 02.07.2015, 17:43
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

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You do realize that they check exhausts at roadsides stops with a flashlight and stick to check for baffles, don't you?

No DB-Killer, no baffles. No Baffles, big ticket, and need to show it at Camorino (unless you meet a nice cop that lets you go with just the ticket after you promise to put the DB-Killers in as soon as you get home).

Tom
I have yet to ride without the baffle. That's why I asked if it was possible to certify the exhaust without the db killer. I have seen some bikes without it though, mostly Italian ones.
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  #29  
Old 02.07.2015, 17:48
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

I used to ride without, now almost all my bikes have them (some home-made), except my 30 year old Guzzi (the 29 year old Guzzi has them, but it has louder pipes).

The 999R with Zard full-system is too loud even for me without the DB-Killers (103dB), but sounds great.

Tom
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Old 02.07.2015, 21:34
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

I tried the noise emissions test with an eBay sound meter, and here are the results:
  • 2nd gear: 86 dbA
  • 3rd gear: 82 dbA
  • 3rd gear: 81 dbA
  • 3rd gear: 82 dbA
So, either I am doing something wrong, the meter is not correct, or the exhaust is already at its limit? Is it correct that I'm doing the test in 2nd and 3rd gear?
I'll have to try the same test on my brother's bike and see if there's a difference / how much of a difference there is.
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Old 03.07.2015, 10:17
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

I have a Yoshimura R77 carbon can on my blade. It isnt EU stamped and does not come with a certificate. I ride with the db insert in and got pulled over the other day for a 'check over'.
All the police did was shine a torch down the can to see (i assume) that the db killer was present. That was it, no other questions on it.
I was told it was an instant fine if found with a can without a certificate, seems this information may be out of date. And I also see and hear many loud bikes on the road ............
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Old 03.07.2015, 10:49
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

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I have a Yoshimura R77 carbon can on my blade. It isnt EU stamped and does not come with a certificate. I ride with the db insert in and got pulled over the other day for a 'check over'.
All the police did was shine a torch down the can to see (i assume) that the db killer was present. That was it, no other questions on it.
I was told it was an instant fine if found with a can without a certificate, seems this information may be out of date. And I also see and hear many loud bikes on the road ............
Same thing I thought, as long as the db killer is inserted, they shouldn't complain... Do you think they could try to remove it to see if it has been modified? I might just try to drill a couple of holes in it to make the sound somewhat louder, while still having the db killer in.
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Old 03.07.2015, 10:53
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Re: Motorcycle-approved exhausts? (Noise limits, emissions, ...)

push them to the limits
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