WOF and aftermarket pipes.

[AllanB]

[QUOTE=OutForADuck;1745679]My Jardin GP-1 puts out 110Db at 6000rpm QUOTE]

Sweet Jesus - if the wind was blowing in the right direction I could probably hear you in Christchurch!

[Wired1]

The whole system is fucked. If you put an aftermarket pipe on and have it certified a cop can still stop you and ask you to have it certified again - there is no "life-long" certification. If the cop asks you to prove it's not too noisy you have to pay for the certification, and if he stops you a week later he can ask you to prove it again, afterall you may have pulled out the baffles after the certification. And forget just leaving the stock muffler on - that's fine if your bike is recent but as they get older it becomes harder to find "stock" parts.
But what someone said earlier is true - if it sounds quiet they won't even ask even if is is stamped "noisy fucker exhausts ltd".

[Creeping Death]

Well I for one am damn glad I came across this thread.Was about to list my factory pipes on Trade Me but thought I'd ask in here about a suitable price range,guess I'll be keepin em now,the ones I have on at the mo keep setting off car alarms,great fun for riding round mall carparks but doubt they'd pass the noise test.

[NighthawkNZ:Me]

guess I'll be keepin em now,the ones I have on at the mo keep setting off car alarms,great fun for riding round mall carparks but doubt they'd pass the noise test.

Mine has set off the odd car alarm and its only 96 db

[lostinflyz]

mwahahaha this is all a crock of shite. some places do one thing. others another. in the end just have to find a good shop.

my wee nc21 has a nice big fat hole in the main exhaust which makes it noisy as but mr. WOF man no care. he wants reflectors and the rear brake lights reconnected. fair nuf i say

i think some shops are scarred (and acting like idiots) and some are using common sense. find a person with a brain and a reasonable exhaust will be no probs.

[Creeping Death]

mwahahaha this is all a crock of shite. some places do one thing. others another. in the end just have to find a good shop.

my wee nc21 has a nice big fat hole in the main exhaust

Its the vibration brutha!

[GSXRMad]

Another issue is how the noise testing is being done. It cannot be done just anywhere due to the amount of ambient or existing noise. Nor can it be done in a building or an enclosed courtyard, due to reflected noise. Nor can it be done on a windy day, raining day etc as all these factors will affect the outcome. Also a cloudy day will affect the noise level compared to a clear day. This is really just a big snafu, and the poor average bloke cops it.
There is only one true way for noise testing, and it is not being done here in NZ. I even witnessed a stock VL800 being tested and it failed, it was being tested INSIDE the building. The tester said it is above the limit, it fails, the stock pipes were pointed out, and the markings on them too, he replied "I don't care" the bike had only been PD'd by the dealer, and had only done 7km, no the pipes had not been modified either. This is truely scary. idiots are being given a piece of equipment and do not know how to use it appropriately. There is a lot more than meets the eye (ear) with noise testing.

[Morcs]

I just used a handheld noise tester to do the DRZ.

its got a full yoshi system, with the insert removed. Its farking loud when at full noise.

However, a stationary test, stood behind the bike and to the side (about 3 meters away) and revd up to about 3-4k only produced a reading of 86db.

Was that the correct testing method?
At full noise I reckon would be about 110...

[Peril]

I just used a handheld noise tester to do the DRZ.

its got a full yoshi system, with the insert removed. Its farking loud when at full noise.

However, a stationary test, stood behind the bike and to the side (about 3 meters away) and revd up to about 3-4k only produced a reading of 86db.

Was that the correct testing method?
At full noise I reckon would be about 110...

I had a LVVTA inspector bring his noise meter in to try out on my XT.
He just stood almost beside the bike,held the meter at about 45 degrees from the end of the muffler and about 30ish cms out from it.
Then he just said roll on the throttle to 3250 (which is what his book said to rev mine to) then roll off again and violia,noise tested.
Now mine wasn't an official test,just more of a wanting to know test.
It was also done inside our very large workshop,so the noise would have echoed quite a bit.I got 101.5db,which was 1.5db over the max limit.It has a two brothers muffler grafted on,which probably came from a big sports bike going by their website.We also gave it a big rev and it came out at 105db,very loud by any standards!

[The Pastor]

you cant do a noise test inside

[Peril]

Now mine wasn't an official test,just more of a wanting to know test.

Yes,it was done inside.Take it outside and it would have been under 100db.I was only doing it for couriosity's sake and to give me an idea of what I am working with.

[Motoxparts]

You could just buy some Two Brothers at WOF time we can lend you some low db noise inserts that will pass any test they fit in around 5-10mins very easy to fit

www.motoxparts.co.nz