Targeting bike with loud exhausts

[vifferman]

Kiss goodbye to your GSXR750k6/7 then, there are a number of RACETRACKS in the UK where they are deemed 'too loud', even with standard exhausts, and the tests are almost identical to the ones that are set to be used here.

Kinda pointless restricting some bikes and not others, given that MotoGP bikes have no such restrictions.

[Gremlin]

Kinda pointless restricting some bikes and not others, given that MotoGP bikes have no such restrictions.

its not so much restricting bikes, its the rules the track has to comply with, to meet requirements set out by the local council. If they exceed the restrictions... bye bye track days. The rules vary from track to track, but generally they can hold x number of days, where noise cannot exceed one level, then they have some louder days (fewer numbers of those etc).

Confusing part for those attending, is that the way they measure, and the limit varies from track to track, and quite a few companies running them do not provide refunds if you are denied time on the track if the bike is too loud. If people have travelled to it, they have accomodation expenses etc, gets very expensive for a road trip and no track time

[MSTRS:Me]

This talk of being denied at tracks in the UK applies here too. Varies as well. I don't know what the test procedure is here at trackside though.
But the point of this thread was to do with roadbikes, particularly cruisers with straight pipes. For WOF compliancy there is still a great deal of subjective 'testing' going on (ie the the tester decides if he thinks it is too loud - perhaps they lose hearing with a little foldie slipped into the pocket?). If 'failed' by the WOF tester, you have to take your bike to a LVV centre for an objective dB test with a meter. I believe the set-up is the meter positioned about 2m behind your bike and revs set to around halfway between idle and redline. If it passes, you get a authorised tag attached to your exhaust. If it fails, go baffle it (a bit).

[Ixion]

Fact: stock, gixxers are failing at trackdays in the UK. They have varying limits, from track to track, yes, but stock bikes are still not passing. If I remember correctly, some of the gixxers are coming out stamped 102db.

...

A reminder that , as far as NZ Wofs are concerned, they CANNOT refer you if the exhaust is stock OEM. If its damaged or defective, they can fail you on a 'defective exhaust', but they can only do the "You need a LVV mod cert" thing is the exhaust (any part of it) is modified or not standard OEM (NB OEM means what the manufactirer designed , not what was on it when the dealer sold it) . No matte rhow loud it is. So if the gixxer is 102dB that's fine, so long as it still has the stock system in good nick.

[The Lone Rider]

What do I tick in the vote thing if I got pulled over for speeding, but they pulled me over because the bike was so loud they knew I was speeding - and then after giving me the speeding ticket noticed the pipes and then chucked in a fine for the pipes also.

[bmz2]

OK got stopped the other day , more to point, the cop wanted to know what the bike it was, he pointed out to me he thought the bike was to load, so a little warning to me keep the revs low , bloody cop wanted a ride.... like shit, you drop it you own it.

But heres the real deal any bloody trying to break a land speed record should do it NOW , if the fools have it their way, every bike ,car will be restricted to the max, you will need NOS just to get to the legal speed limit

[AlBundy]

We all know Hardleys don't handle, so one of the few bits of enjoyment their owners get, is to make a lot of noise from standstill.

Now for them, they will obviously see this as negative but sometimes it can be downright offensive, having to listen to it...

As stated before, a deep rumble is good but some of them are just too much of a loud crackle...

I'm surprised Harleys have got away with it for so long...

[alanzs]

Harley tried to patent the sound their bikes make. They were unsuccessful. How can you patent "potato, potato, potato, potato?"

[jafar]

The decibel restriction is still quite high so most won't be affected.

If you have loud pipes better have the baffles in when it is WOF time

[The Lone Rider]

Harley tried to patent the sound their bikes make. They were unsuccessful. How can you patent "potato, potato, potato, potato?"

They were able to patent aspects of the design that were key to getting that sound however.

Honda's ACE was an attempt to copy it, using.. I guess you could call it.. "clever" engineering with the crankshaft or something.

I like loud bikes.

As long as they aren't being ridden at night when people are sleeping, I'm all for drag pipes. Even open ones although I quickly got tired of the open drags I had on my last bike.

I thought the noise problem stemmed from the noise a lot of the boy racer cars make - and the boy racers are particularly problematic not only for the dangerous behavior but also the noise they make. Particularly when they congregate in groups at night.. or even the fact alone that their social culture IS driving around at night.

[MXNUT]

A reminder that , as far as NZ Wofs are concerned, they CANNOT refer you if the exhaust is stock OEM. If its damaged or defective, they can fail you on a 'defective exhaust', but they can only do the "You need a LVV mod cert" thing is the exhaust (any part of it) is modified or not standard OEM (NB OEM means what the manufactirer designed , not what was on it when the dealer sold it) . No matte rhow loud it is. So if the gixxer is 102dB that's fine, so long as it still has the stock system in good nick.

NOT CORRECT,as of the 1st July 2008 it does not matter if the exhaust system is stock or factory. If it exceeds the maximum level ( which varies depending on the number of cylinders ) then you can be refused a Wof or be made by a police officer to have a subjective noise test.The subjective noise test can ONLY be carried out by a specialist LVV certifier with a far more accurate noise meter than wof agents/testing stations use and the cost for this subjective noise test is around $120.00

[Ixion]

Argue with LTSA. That's their official statement to BRONZ. Which agrees with the VIRM

Modification
6. A class LE, MA, MB, MC, MD1, MD2 or NA vehicle that
has been modified so as to increase its exhaust noise
output must have the exhaust system inspected,
tested and certified by an LVV specialist certifier,
unless:
a) the increased noise output is clearly below
(Note 3) the applicable noise limits, and
b) has been inspected in accordance with the
requirements in this manual, including those for
equipment, condition and performance.

Tania Luckow at Land Transport NZ is the person you want to argue with.

Cf this post

EDIT: Note taht this does NOT apply to a VIN "WoF".

[gunrunner]

But do have a mate with a Bandit with aftermarket exhaust and has been warned from a local motorcycle shop (who will remain nameless) to change it .

[Timber020]

A while back I was picking up some gear and was waiting at a crossing wearing my bike gear with my helmet on my arm along with about 15 kindergarten kids with handlers.
2 harleys pull up on the red light, we get the green walk signal and start crossing. These two guys old enough to know better start reving what could only have been open pipes. They were LOUD. I work with chainsaws and chippers all day and it was hurting my ears.
The kids start screaming and scatter, trying to get away from the noise in all directions, up the street, between cars, etc with handlers desperately trying to control them. I give chase to two little kids running up the street where cars in another part of the intersection are on green so are moving. I get one under my arm and nab the other by his tigger the tiger hoody.
Bikes are still reving.

I get the kids to the footpath and drop em at the feet of one of the handlers and im as angry as all hell, I turned and ran towards the gits, I didnt know what I was going to do but someone was going to regret it, but the light turns green and the bikes take off, leaving a pissed off guy in bike gear standing in traffic, alot of pissed off pedistrians and some really scared and crying kids.

One of the handlers who is also a client of mine looked at my gear and asked me "those friends of yours?"

Ive Never felt embarrassed to be a motorcyclists before. Its not just the boy racers making this law get enforced.

[Darth Fader]

Howzit all, I don't know if there are many Boulevards M1800R's down your way, but I've just removed my baffles from the stock pipes as I do not think that the aftermarket Cobra's do anything for the bike, except make the bike look crap. The sound now is not intrusive, unless I REALLY twist the throttle, but a lovely DEEP rumble...something like a thunder storm coming down the road behind those sleepy cagers. It most certailny wakes them up, but so far, the neighbours have not yet complained. Anyone else with a Boullie??

DF