Noise measuring SFC1000 with Jota cans.

I am with Piet on this. My Jota for sure isn't quiet at all with the Campbell Jota cans on it. But as Piet suggests, I controle noise with the gear box and simply shift up, when I get into regions where houses are or if I see children, animals or similar. Helps a lot...
 
I tried some standard Lanfanconis on TOG three years ago and it was horribly flat, Jota cans went on after 3500 miles doing the three weeks of the Northern Spain rallies. I would like her quieter, without strangling the stomp, but like Piet its not hard to moderate when required, eg passing through the village where I live and all the do goodies/councillors can recognise the sound of a triple on song and know who it is, a favourite trick is to come into the village by the Southern route, (no houses only fields) which leads to a downhill (slightly) half mile section, then a tight left, and then the village starts after the corner, and a small pub, full noise on the approach, lots of downchanging for the corner and even more noise, then trickle through the village past the pub with everone's body language saying "we know what you've been up to" can be amusing on a sunny day with revelers outside the pub, but I simply cannot ever be caught speeding in the village, the reputation that I have spent 40 years building would be in tatters, and I do the same in other similar places, hoping that more will do the sam in mine.
CLEM
 
Sir Sidney Ruffdiamond said:
I agree - The worst offenders are the Harley’s and the chipped Akro rockets plus the 555 Subaru crowd
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Agree, but where I live modified Ferraris, Lambos, Hellcats, Vettes, and Roush F150s wake the dead on weekends, Revero GT by Karma you can sleep through. I live at the bottom of a very challenging 35-mile mountain road a gateway road to the challenges of the Santa Rosa, San Jacinto, and Palomar Mountain roads. Noisey vehicles suck they attract CHP, Sherrif Departments, and other cops.
 
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I want my bike/s to be fitted with exhausts that offer as close to optimum performance as poss while being as quiet as poss.

Why anyone with a bike that does 0-160kph in 5 sec (not mine!) would want everyone within a kilometre to know it is beyond me. Stealth bombers have distinct advantages for obvious reasons!!
 
Yes, that's a thing, blowing flames out the exhaust is also popular. The stupidly of this to me is both indicate a shit tune and that's how it's done, unburnt fuel exploding in the open exhaust, just like when you don't tune properly. And they pay to get that done
 
piranha-bro2 said:
I want my bike/s to be fitted with exhausts that offer as close to optimum performance as poss while being as quiet as poss.

Why anyone with a bike that does 0-160kph in 5 sec (not mine!) would want everyone within a kilometre to know it is beyond me. Stealth bombers have distinct advantages for obvious reasons!!
Click to expand...
Yes, stealth bikes are what you want, as far as I can see (hear) that is the only advantage of an E Bike.
 
Hello guys,
Very interesting read.
So, for my bike, as I mentioned, the MOT tester and I did a complete calibration of the standarised microphone/noise tester according to regulations, and then a set up of the area: no walls, no grass, no traffic, no wind, and so on.
Then there are 3 methods one shall follow described well in the law regarding this.
So, we did, for example the "standstøjsmåling" is measured nearly how Lothar describes. I believe this is a consequence of Denmark being a small country, and we often look to Germany's rules and regs. Anyway, these are ow the EC rules (scr.. the ec), and for certain years there are certain numbers. For example, mine is a 1986, so that means that according to the new rules per 1'st of March 2022, there is no demand of original parts, no demand of "ec" marked parts, no demand of a catalyzer, and the SFC1000 may make 84db + 3db as it's a used bike, so 87 db. We made all the measurements according to rules and setup and got 81,6 dba (not the 81,4dba I wrote earlier).

Regarding the rpm on that test, it must be performed at s/2, meaning s = engine rpm at max engine power, divided by 2. My bike is not developing power at 8900 or what ever, but standard at 7500 rpm according to original Danish reg. papers. The Service manual says at 8000, so we measured at 4000 rpm. even slightly more.

Another of the test methods that have to be made is a passing by with strict rules of positioning the microphone, angles, distances etc. Same result.
All tests must be done at least 3 times, and the highest value counts. If a value deviates with more than 2 db, all tests are nulled and all must be repeated until a satisfactory result can be obtained, including a recalibration of the microphone device, of which there are strict rules of which one etc.
So, same result.

Personally, I think it's a loud motorcycle if at standstill nailing the gas, or if accelerating hard till 8000 rpm, but it can also easily be driven much more silent and non-intrusive, which is what I do. Always.

On a second note, I spoke to a gentleman from UK based exhaust company, which a while ago introduced sound devices for electric and hybrid cars, not to make loud noise, but because it lowers the accident rate. They sell a lot of these. Again, they cannot make loud noise, but the add a reasonable level of sound to avoid accidents.

So, for example I have read all the hundreds of pages of the new law, and for example I can lawfully install 4 pot Brembo calipers, as long as they are not on a bracket, which they are, and as long as they are made in at least 400 pairs.
I can then legally install the brackets as long as they are Brembo brackets or if they are made by someone else, as long as they are made in 400 examples or more. So, the popular brackets by for example Stein-Dinse in Germany, are legal, as long as they made 400 sets or more.
One off parts related to exhaust, smog and brakes, as well as suspension, have to be tested according to a very thorough testing system, including hard acceleration, deceleration and skidding tests etc. That is a whole other situation, unless there is a EC test and acknowledgement or German TÜV papers. then it's legal.

I can also install other clipons, and so on. New bikes? That is a whole other ballgame, with MUCH stricter rules.
Fut funnily enough, there is a law against aftermarket cone filters. I run original Laverda filters anyway, so no problem.

Just to be clear: this is in Denmark and to some extent according to EC rules, but each member-country can have stricter rules, not sloppier rules. And in most cases, Danish rules are much stricter.
You Brits are SO lucky. And Swedes have a great system with one-off builds, that is legalized. Perfect. Some of the same CAN be done in Denmark, but it is very very expensive to have these tests done by an approved technical company, and it also includes a reevaluation of the 180% tax that was paid when the bike was first registered in Denmark. That usually means a new 105% tax have to be paid, which is pretty much money even by todays level. That will make the bike really expensive, and will probably surprise all of you abroad. I mean seriously expensive. Same for cars.
There are though some examples of lesser new tax, if only a smaller part has been changed, and the general identity is not changed. Say for example tax that amounts to 4000 euro for a complete brake change.

The evaluation of that tax are not according to a strict specific law, but is undertaken by a committee of special appointed persons within the Danish tax-system. So there is no general rules for this, but instead is is estimated by these persons, who, sorry to say so, don't know jack s..t about say a Laverda.

Such is life. Very expensive country to live in. And if someone thinks we make millions in salary, think twice. Last time I looked, the level of salary was some 20% higher than Germany for the average worker. All this is not a criticism, but a description what we are up against here in Denmark.
Willy nilly.

Cheers,
Jacques
 
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Wow, how ofter is the sound test needed, hopefully only the first time it's registered and not annually. Here in Oz, we are reasonably relaxed re sound, BUT every now and then if your stupid loud the cops in this state can and do send you to a Government test centre, EPA for sound testing and that does get expensive. Its rare and apparently doesn't apply to some Harleys, little joke.
 
Well, once. Demark voted against annual or bi-annual MOT's for motorcycles at an EC meeting some years ago in Germany, and the idea of roadside checks was the compromise. Theis came into effect the 1'st of March 2022.
So, only a registration MOT and if the owner changes after more than 5 years from when the bike was new, or thereafter every second year, if the bike changes owner. So that will be an MOT for a new owner and the eventual forthcoming owners thereafter.
If the bikes does not change hands, no MOT's. Thas has been the practice for years.
Because of the aforementioned meeting in the EC, and many many complaints from private persons because of noise from motorcycles, cars and plus cheating with addblue for dieseltrucks, and their "adjustment" of the diesel pump pressure, that makes more power and MUCH more smog, these rules are now in effect with the addition of "road side check", which is extended compared to before 1'st of March 2022.
Any cop or special trained MOT'er can now stop anyone and go through the vehicle in detail, as well as bigger setups where every driver will be taken aside and the vehicle inspected accordingly to new rules. If in doubt of smog or highly ikkegal tuning (many chip'ed cars), the vehicle can be confiscated and brought in for a parts exchange to originality at a workshop, chosen by the importer of that brand.
As there are many factors that this law did not take into consideration, it's been halted a bit in some parts of the country because of the needed specific rules for this, but did happen in Jylland (west), to a degree. + heavy fines of course...
Anyway, Laverda's are good to go for now.
Soundtests according to the new law are now in effect, so that these special trained MOT'ers and cops can perform them on side.

Another new law from 2021 makes it illegal to make noise over 74 db between 22:00 and 06:00. From 2023, this will be extented to around the clock. Talk about strict rules. Any gardening machinery will make more noise. Plus in Copenhagen they are now closing streets for bikes and cars running on Petrol and diesel. This they want to extend to 100 streets, and removes some 40.000 parking lots.
Only electrical cars allowed. They also work on a banning of hybrid cars from 2028, some suggested 2035. This is not really doable, and it is expected to be in effect years later.

So the dream of those who became tired of other people making noise with their vehicles, which has some merit, became true. Not because of the amount of complaints, but because it is a law initiated years ago, in combination with complaints.
The reality became far more including, as it covers all aspects of any vehicle, not only noise and missing addblue from (mostly foreign) trucks, as was the original initiative.
On the other hand, speculating a little bit on noise, say loud parties at private homes and loud street music from boom boom boxes became illegal during the covid lockdown and many got a fine. It was all over the news for a long time.
Rumor has it, that the noise testing was meant to hit Harley and loud pipes, say akropovic on jap scrap, in their mean forms, as they are usually the culprit of extreme noise far beyond what is considered a nice sports exhaust and resonable levels.

So, at present day, the new rules are not performed nationwide, but partially, and there are therefore many rumors regarding the extent of this. I spoke to my local MOT'er and he talked to the leader of this new task group, to get some more facts, not rumors. It's not implemented yet nationwide, but soon to be. So some of the videos circling around on say flutube, are simply not true. There has long been a possibility for a cop to call you in for an extended MOT, if there was a reasonable suspicion of illegal tuning, which is VERY strict here in Denmark.
I think this description clears some of the rumors, for facts.

Cheers,
Jacques
 
redfox said:
Well, once. Demark voted against annual or bi-annual MOT's for motorcycles at an EC meeting some years ago in Germany, and the idea of roadside checks was the compromise. Theis came into effect the 1'st of March 2022.
So, only a registration MOT and if the owner changes after more than 5 years from when the bike was new, or thereafter every second year, if the bike changes owner. So that will be an MOT for a new owner and the eventual forthcoming owners thereafter.
If the bikes does not change hands, no MOT's. Thas has been the practice for years.
Because of the aforementioned meeting in the EC, and many many complaints from private persons because of noise from motorcycles, cars and plus cheating with addblue for dieseltrucks, and their "adjustment" of the diesel pump pressure, that makes more power and MUCH more smog, these rules are now in effect with the addition of "road side check", which is extended compared to before 1'st of March 2022.
Any cop or special trained MOT'er can now stop anyone and go through the vehicle in detail, as well as bigger setups where every driver will be taken aside and the vehicle inspected accordingly to new rules. If in doubt of smog or highly ikkegal tuning (many chip'ed cars), the vehicle can be confiscated and brought in for a parts exchange to originality at a workshop, chosen by the importer of that brand.
As there are many factors that this law did not take into consideration, it's been halted a bit in some parts of the country because of the needed specific rules for this, but did happen in Jylland (west), to a degree. + heavy fines of course...
Anyway, Laverda's are good to go for now.
Soundtests according to the new law are now in effect, so that these special trained MOT'ers and cops can perform them on side.

Another new law from 2021 makes it illegal to make noise over 74 db between 22:00 and 06:00. From 2023, this will be extented to around the clock. Talk about strict rules. Any gardening machinery will make more noise. Plus in Copenhagen they are now closing streets for bikes and cars running on Petrol and diesel. This they want to extend to 100 streets, and removes some 40.000 parking lots.
Only electrical cars allowed. They also work on a banning of hybrid cars from 2028, some suggested 2035. This is not really doable, and it is expected to be in effect years later.

So the dream of those who became tired of other people making noise with their vehicles, which has some merit, became true. Not because of the amount of complaints, but because it is a law initiated years ago, in combination with complaints.
The reality became far more including, as it covers all aspects of any vehicle, not only noise and missing addblue from (mostly foreign) trucks, as was the original initiative.
On the other hand, speculating a little bit on noise, say loud parties at private homes and loud street music from boom boom boxes became illegal during the covid lockdown and many got a fine. It was all over the news for a long time.
Rumor has it, that the noise testing was meant to hit Harley and loud pipes, say akropovic on jap scrap, in their mean forms, as they are usually the culprit of extreme noise far beyond what is considered a nice sports exhaust and resonable levels.

So, at present day, the new rules are not performed nationwide, but partially, and there are therefore many rumors regarding the extent of this. I spoke to my local MOT'er and he talked to the leader of this new task group, to get some more facts, not rumors. It's not implemented yet nationwide, but soon to be. So some of the videos circling around on say flutube, are simply not true. There has long been a possibility for a cop to call you in for an extended MOT, if there was a reasonable suspicion of illegal tuning, which is VERY strict here in Denmark.
I think this description clears some of the rumors, for facts.

Cheers,
Jacques
Click to expand...

74db. My neighbour talks louder.
 
My brother has an electric bike (Zero). The bloody thing sneaks up on you.
It's a strange thing to ride. No clutch or gears. When you switch it on, there's nothing to indicate anything has happened other than a little LED in the dash (no neutral light because it doesn't have neutral). Then you just turn the twist-grip to take off almost silently. There's just a slight whirr from the drive train. It has a toothed rubber belt to the rear wheel that's almost silent.
 
Dellortoman said:
My brother has an electric bike (Zero). The bloody thing sneaks up on you.
It's a strange thing to ride. No clutch or gears. When you switch it on, there's nothing to indicate anything has happened other than a little LED in the dash (no neutral light because it doesn't have neutral). Then you just turn the twist-grip to take off almost silently. There's just a slight whirr from the drive train. It has a toothed rubber belt to the rear wheel that's almost silent.
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Ask Drikko about the e-bikes.
 
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