Straight pipes for a chopper?

[barty5]

Wanting to know what is the deal with straight pipes back in NZ been living in US for a while and due to move back to NZ this time next year so with chopper with straight pipes be able to be registered as thats what it came with when built ???

[Paul in NZ]

I doubt it....

[Akzle]

like dump pipes? unlikely. inspection will fail on dB. i don't know what the actual limit is, but anything over about 110 causes hearign damage, so probably about that.

[barty5]

like dump pipes? unlikely. inspection will fail on dB. i don't know what the actual limit is, but anything over about 110 causes hearign damage, so probably about that.

Yeah pretty much dump pipe as use to be on the like of orange county choppers. I thinking if it was factory made as such ie bike being made that way from new ?? There use to be probably still are some some what loud bikes back in NZ. Might have to find some sort of muffler to get compliance first I guess unless someone knows different.

[HenryDorsetCase]

http://www.nzta.govt.nz/resources/rules/vehicle-equipment-amendment-2007-qa.html

Have a wee look thru this.

you will see it specifies the procedure and the limit, which is 100dBA for moor'sickles.



I hate loud pipes on bikes personally, but so does the gubblemunt it seems

[bogan]

http://www.nzta.govt.nz/resources/rules/vehicle-equipment-amendment-2007-qa.html

Have a wee look thru this.

you will see it specifies the procedure and the limit, which is 100dBA for moor'sickles.



I hate loud pipes on bikes personally, but so does the gubblemunt it seems

Can confirm, VTNZ do test for this. Not to the spec'd level of testing, just wave a decibelometer round the back end while giving it some revs.

[BIG DOUG]

Just fit up some stock pipes to get it complied/vinned then fit your old pipes,also does it have indicators if not you will need those + a whole of of other useless shit you will have to do to it,Why not post a pic.

[jellywrestler]

Just fit up some stock pipes to get it complied/vinned then fit your old pipes,also does it have indicators if not you will need those + a whole of of other useless shit you will have to do to it,Why not post a pic.

they take photos now when certifying bikes and if you change they'll know. also they often note if it's a limited/modified vehicle on the compliance plate things like pipe brands. i'm going through that process myself. There's some shit to deal with like number plate must be within 15 degrees of vertical etc etc
don't forget to have the correct headlight for our side of the road too.

[AllanB]

I hate loud pipes on bikes personally, but so does the gubblemunt it seems


Did you not own the loudest Triumph Scrambler in Christchurch :lol::lol::lol::lol::lol::lol::lol:



It will fail with open pipes. Rightly so too - sound like crap and just piss everyone off. I like a bit of pipe (mmm Yoshis) but straight open ones with no baffling:crazy:

[cs363]

I like a bit of pipe


Typical Honda rider! :lol:









Sorry, but you did leave that door wide open!

[skippa1]

Wanting to know what is the deal with straight pipes back in NZ been living in US for a while and due to move back to NZ this time next year so with chopper with straight pipes be able to be registered as thats what it came with when built ???


Just fit up some stock pipes to get it complied/vinned then fit your old pipes,also does it have indicators if not you will need those + a whole of of other useless shit you will have to do to it,Why not post a pic.
^^^^^this....don't listen to the nay sayers, loud pipes save lives.......

i have had some "hell" loud pipes, never been an issue

[Motu]

and the limit, which is 100dBA for moor'sickles.

97db for the WoF. Some engines are surprisingly quiet at their testing rpm - eg, 2 valve twins are tested at 2,500rpm, a Harley is pretty quiet there.

[BIG DOUG]

Only if the idiot knows how to do a decibal test,like at the local vtnz they do it in a big tin shed with a meter shoved up the pipe "OH MY GOD THATS TO LOUD" explained to him that it is 1mtr back from muffler,1 mtr to the side and 500mm of the ground is where the meter sits and outside in an open space and spyda we have had a few bikes vinned and never have they wrote the brand of pipes down.

[HenryDorsetCase]

Did you not own the loudest Triumph Scrambler in Christchurch :lol::lol::lol::lol::lol::lol::lol:


:

..............what? can't hear you. speak up, man!

:blush: yeah it was pretty loud. Maybe what I dislike is OTHER people's loud bikes....?

[HenryDorsetCase]

Only if the idiot knows how to do a decibal test,like at the local vtnz they do it in a big tin shed with a meter shoved up the pipe "OH MY GOD THATS TO LOUD" explained to him that it is 1mtr back from muffler,1 mtr to the side and 500mm of the ground is where the meter sits and outside in an open space and spyda we have had a few bikes vinned and never have they wrote the brand of pipes down.

Thats good info, thanks!

[Motu]

Only if the idiot knows how to do a decibal test,like at the local vtnz they do it in a big tin shed with a meter shoved up the pipe "OH MY GOD THATS TO LOUD" explained to him that it is 1mtr back from muffler,1 mtr to the side and 500mm of the ground is where the meter sits and outside in an open space and spyda we have had a few bikes vinned and never have they wrote the brand of pipes down.

While we are on the subject of idiots, if you are going to call someone an idiot, and then set the facts right, make sure you get the facts right, otherwise you are an even bigger idiot.

The correct procedure is 500mm at a 45 degree angle from the outlet, and a minimum of 200mm from the ground. Different engines are tested at different rpm's....

Type of engine


Required test speed

2-stroke single cylinder


6000 rpm

2-stroke multi-cylinder


5000 rpm

4-stroke single cylinder


3000 rpm

4-stroke twin-cylinder with 2 valves per cylinder


2500 rpm

4-stroke twin-cylinder with 3 or more valves per cylinder


4000 rpm

4-stroke with 3 or more cylinders


4500 rpm
Engines other than motorcycle engines

Type of engine


Required test speed

Rotary engine


4500 rpm

Up to 5 cylinders


4000 rpm

Up to 5 cylinders with DOHC and variable valve timing


4800 rpm

6 cylinders


3200 rpm

8 cylinders


3000 rpm

More than 8 cylinders


4000 rpm

Diesel (any type)


2500 rpm

[jellywrestler]

Only if the idiot knows how to do a decibal test,like at the local vtnz they do it in a big tin shed with a meter shoved up the pipe "OH MY GOD THATS TO LOUD" explained to him that it is 1mtr back from muffler,1 mtr to the side and 500mm of the ground is where the meter sits and outside in an open space and spyda we have had a few bikes vinned and never have they wrote the brand of pipes down.

certified low volume is what i was talking about, he says he has a chop which most likely will need that process, you're more in that world then I am Dougal though.

[BIG DOUG]

Now now spyda I know you own a chopper so you are now in my world.

[BIG DOUG]

motu fuck off,I was generalizing they don't know what to do themselves so how are the rest off us meant to know,but we now do as you have laid it all out for us.

[Motu]

I was generalizing

Generalising was it? You haven't got a clue, and people have just thanked you for the misinformation. I wonder what the VTNZ inspector thought when you told him he was doing it wrong....and then told him how to do it wrong?

[BIG DOUG]

Do you work for vtnz or something,been crook for a few days so when I get to work tomorrow I'll check the regs myself,as for the original question just put stk pipes on it and remove when you have been through the process easy as.

[Motu]

Why do you need to go to work to check? The VIRM is online and you obviously have a computer - you could've checked your facts before writing that bullshit.

[Kickaha]

as for the original question just put stk pipes on it and remove when you have been through the process easy as.
That wont stop you getting ticketed if you get pulled over though

[barty5]

Do you work for vtnz or something,been crook for a few days so when I get to work tomorrow I'll check the regs myself,as for the original question just put stk pipes on it and remove when you have been through the process easy as.



All good where would you suggest stk pipe would go given they are built this way.

[pete-blen]

Wanting to know what is the deal with straight pipes back in NZ been living in US for a while and due to move back to NZ this time next year so with chopper with straight pipes be able to be registered as thats what it came with when built ???


I bloody hope not...:mad:

[BIG DOUG]

I have a right side drive 2-1 of a an american ironhorse here which would be way quieter than those vance + hines ,and also some stock pipes but I'd say a bracket or two would be needed to make those fit, where in new zealand are you going to be living and for the record there are plenty of bikes running around nz with those pipes on.Not a bad looking bike you have there.