WOF noise test

**the mouse** · 14th April 2009, 22:49

I questioned my muffler noise with the tester at the last wof as they are getting a bit rowdy, his reply " Nope, not bad compared to some of the Hurleys we get in here."

Loud bikes let the tin tops know you are there.

**howdamnhard** · 14th April 2009, 23:03

Just had a WOF done on my bike, don't recall them doing a noise level test , but then I only have standard pipes.

**chap** · 15th April 2009, 10:02

firstly yes ive been tested. and fined for excessive noise. you can incurr points on ya license too. bit of a hassle changing my pipes but that only comes round once a year. running bassani 2-1 pipes on the hog so at least im audibly visible to cagers. loud pipes save lives.

**vifferman** · 15th April 2009, 10:28

Loud pipes save lives?

**vgcspares** · 15th April 2009, 10:45

this doc:

http://www.lvvta.org.nz/stdExhaustNoiseEmissions.pdf

indicates Motorcycle engines need to be tested at the following RPM:
2.6(2)
The engine speed for the exhaust noise emission test of a motorcycle engine, must, for the duration of each test, be within a tolerance of +/- 5% of either:
(a) in the case of an engine that has a manufacturer’s engine speed maximum power (ESMP) that is known to the LVV certifier, 50% of that figure; or
(b) in the case of an engine that does not have a manufacturer’s ESMP that is known to the LVV certifier, or the manufacturer’s ESMP has become irrelevant because the engine is now outside of its original specification:
(i) 6000 RPM if the engine is a 2-stroke single-cylinder engine; or
(ii) 5000 RPM if the engine is a 2-stroke multi-cylinder engine; or
(iii) 3000 RPM if the engine is a 4-stroke single-cylinder engine; or
(iv) 2500 RPM if the engine is a 4-stroke twin-cylinder engine with 2 valves per cylinder; or
(v) 4000 RPM if the engine is a 4-stroke twin-cylinder engine with 3 or more valves per cylinder; or
(vi) 4500 RPM if the engine is a 4-stroke engine that has three or more cylinders;
or
(c) in the case where a low volume vehicle certifier believes the engine speeds specified in 2.6(2)(b) are unreasonably high, taking into account the type and age of the engine, he may apply an engine speed for the purpose of the sound level test at which he believes is appropriate for the engine, and at which the engine may be safely operated

I bet all the testers don't know this but it may pay you to

**Motu** · 15th April 2009, 18:16

Gee,thanks for that,I didn't know there were any rules - I've just been revving them to the red line.

**crazyhorse** · 17th April 2009, 07:08

I have a yoshi pipe on my SV650 (older model) and its really loud. Been to the testing station last week, and they just commented on how nice it sounds etc.... yet I expected there to be a problem - esp since there would only be about 8 mm between the pipe and swing arm - yet, I have never had a problem with it - might depend on where you go for your warrant?

**Dodgyiti** · 17th April 2009, 07:33

Does this rule apply to bikes pre Euro 1/2/3 ?
There were no regs when my bikes came out that I know of (pre 1980's) and they are loud with factory pipes, and you can't get factory pipes any more for them and being Italian, the original mufflers rust out in a year or so anyway.
I have not been noise tested on them yet, but expect to sometime down the track. I used to stuff a wadd of stainless kitchen pot scourer down the open pipes I used to run before I pulled in to the WOF place... this sucks

**nallac** · 17th April 2009, 07:56

Originally Posted by peasea

Yup, got a fail, went home, put standard mufflers on, got WOF, went home and reversed the procedure. Fuckers.

It helps when you know a WOF inspecter, who knows thats going to happen and lets it slide......

**peasea** · 17th April 2009, 08:07

Originally Posted by nallac

It helps when you know a WOF inspecter, who knows thats going to happen and lets it slide......

Yeah, some are sensible and know that it's not worth the hassle, but they're few and far between. Personally I don't like bikes that are too noisy.

**rosie631** · 17th April 2009, 08:35

Originally Posted by Dodgyiti

Does this rule apply to bikes pre Euro 1/2/3 ?
There were no regs when my bikes came out that I know of (pre 1980's) and they are loud with factory pipes, and you can't get factory pipes any more for them and being Italian, the original mufflers rust out in a year or so anyway.
I have not been noise tested on them yet, but expect to sometime down the track. I used to stuff a wadd of stainless kitchen pot scourer down the open pipes I used to run before I pulled in to the WOF place... this sucks

Yep, it does apply. My bike is a 95, so before regulations and was told it don't matter, still have to comply.

**vgcspares** · 17th April 2009, 09:51

if anyone does hit a snag I can probably work something up in the way of a removable restrictor that would get the exhaust through a test ....

**rosie631** · 17th April 2009, 10:24

Originally Posted by vgcspares

if anyone does hit a snag I can probably work something up in the way of a removable restrictor that would get the exhaust through a test ....

I might be interested in that. Thinking about putting drag pipes on my bike and there's no way I will get a WOF with them. Don't really want to go thru the hassle of swapping pipes everytime I need a WOF.