Noise at Kaitoke

[hmurphy]

Apparently it's only the cadet karts (the big ones, I don't even know if that's cadets haha) that have to warm them up at the top of the carpark. Everyone else can do what they like. That's what I was told by the clerk of the course last meeting.

[Kickaha]

Apparently it's only the cadet karts (the big ones, I don't even know if that's cadets haha)

Cadets are for the small kids, biggest are Open class (up to 250cc)if they run them, other wise it's KT100 classes, Rotax max and maybe KZ1/2

[John_H]

I just bought one but I think it may only ever see one round while I get a good system made.
It was such cheap crap metal on the end caps that welding was a issue.
Once I have some clipons ill try get it running and see if its quiet enough to run.

I have the same pipe. It's definitely a cheapy but compared to many, if not most of the pipes there, it's quiet.

[mossy1200]

I have the same pipe. It's definitely a cheapy but compared to many, if not most of the pipes there, it's quiet.

Cool. I didnt want to spend alot as I might go 2t before the end of the year once I have a good set up handling wise.

[NSR143]

My support for those asking for quieter bikes PLEASE...

Do not faf about figuring which rule is this and what the karts do and local council guides and MNZ rules. Just get in the shed and F-ing well get on with fixing the problem.

see my general guide as outlined in my 'winter exhaust projects' post some time ago below.

----------------------------------------------

The best I would suggest is that if you can run your bike up and down a residential street without causing to much public trauma or aggravation you're probably about where you need to be. (on a Sunday morning at 11:15am subject to reasonable local conditions and excluding areas prone to church services, riots, gunship weapons discharge, days of national mourning etc)


------------------------------

Sort it out or lose it!

[jellywrestler]

some I phones have noise meters on them , while they may not be perfect at least they're something you can use to assess how noisy you are to start with and how progress is when you're quietening things down.
Bear in mind too the noise your bikes emit will be louder on an overcast day, by up to three DBs so err on the side of caution

[BMWST?]

i think its also the difference in the way bikes and karts run...the karts engine speeds are probably more consistent than the bikes ?.

[John_H]

When is the noise reading taken i.e. at idle or maximum revs and from what distance from the bike?

[White trash]

I have the same pipe. It's definitely a cheapy but compared to many, if not most of the pipes there, it's quiet.

Fuck off. It's loud as.

[John_H]

Fuck off. It's loud as.

Then you haven't heard it against everything else there. It's not nearly as loud as many buckets.

[speights_bud]

My advice is don't shrug this warning off! From recent experience with official noise testing at Roys hill we've learnt a few things the hard way and now we don't have a track to ride on anymore.

Riders, if commonsense says it sounds too loud then piss off home or fix it, simple as that. We had bikes turn up for OFFICIAL noise testing (with all the proper gear and expensive man to operate it all ) and riders were simply justifying their noisy bikes by simply saying 'But my bikes not even as loud as his/her one'. Even when some club members offered and phoned around two weeks before offering to come modify & quieten exhausts etc for the test day for FREE nobody took up the offer. As a result only a few bikes were at a level where you could honestly think that yea these are a 'sensible' volume.

It really doesnt matter fek all what the noise meter's give as a reading it's just an expensive piece of paper, if it sounds noisy or is annoying to neighbors regardless of what the actual readings say etc you'll have issues.

Don't fuck it up coz we don't have anywhere to ride here anymore and we need your track too!

[koba]

Then you haven't heard it against everything else there. It's not nearly as loud as many buckets.

So it's quite likely too loud then...

Next bit is a general stream of thought on the issue, some of it's been covered but it does need reinforcement.

Noise meters are good because they are an objective measurement that can be used to settle a disagreement and/or enforce or comply with a set standard BUT I think we should all also keep in mind that we are only going to have problems when someone complains based on their subjective observations.

Avoiding the subjective observation, whoever's it is, that leads to a noise meter being pulled out is the best course of action.

I think is easy to go "shit, he thinks it's loud but I test it at 50db, that can't be a problem".
Flawed logic that; if someone thinks it's too loud they may be a softcock or whatever but ultimately someone thinking it's to loud is what leads to problems. It has been pointed out that HEAPS of buckets are too loud at Kaitoke so that means there really is a problem.

Fixing this NOW is really important, don't wait get onto it now. If there is a slightest bit of doubt muffle it more!

Also, for what it's worth I've found having a bike that is quieter than almost all others on the track has given me a fantastic on-track advantage, I've made heaps of sneaky passes when people have taken a loose, non-defensive line because they have expected to hear a bike behind them.

The next pipe will be even more muffled.


EDIT: Can you tell I didn't read the post above before posting? Still, It bears repeating...

[TZ350]

... for what it's worth I've found having a bike that is quieter than almost all others on the track has given me a fantastic on-track advantage, I've made heaps of sneaky passes when people have taken a loose, non-defensive line because they have expected to hear a bike behind them. The next pipe will be even more muffled.

The sneak attac, works a treat .....

[Shorty_925]

All the kart tracks will be operating under a resource consent from the local council - which may well be a lower limit than MNZ....

Time I think for you guys to ask what the conditions of use are.

Correct. If the RC doenst cover you, no matter how little the amount of noise you make, if your not allowed to be there....it wont take much.

[hal20308]

Correct. If the RC doenst cover you, no matter how little the amount of noise you make, if your not allowed to be there....it wont take much.

I think we're all in agreement here: let's be proactive and be seen to be policing ourselves and it will go a long way to ensuring this issue does not get any worse. It's been raised at the kart clubs AGM therefore the committee will be under an obligation to report on it next time. So, if the dB meter is there on the next kart day let's start taking some readings from everyone's bike and recording them as a start. Let's also ask the kart club (as has been suggested) what the limit should be, but seeing as "too loud" is subjective, let's be flexible enough to come up with our own limit that makes sense.

A static reading won't work as most bikes don't have a tachometer so we can't create an agreed "standard". I understand the kart clubs meter was at trackside somewhere so let's just use their location or suggest a better one. The start line or half way down the back straight might be a good starting point or anywhere else the majority of bikes are revving out.

We know what happened in HB - that was a disaster for everyone up there.

First and foremost: if you get told you're bike is too loud: don't take offence. Just fix it. Too many Motorhead concerts in the '80's means my hearing is buggered anyway......