View Full Version : Straight pipes for a chopper?
barty5
16th June 2014, 09:10
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
16th June 2014, 10:43
I doubt it....
Akzle
16th June 2014, 10:53
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
16th June 2014, 11:09
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
16th June 2014, 11:38
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
16th June 2014, 11:45
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
16th June 2014, 16:07
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
16th June 2014, 18:01
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
16th June 2014, 18:34
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
16th June 2014, 19:09
I like a bit of pipe
Typical Honda rider! :lol:
Sorry, but you did leave that door wide open!
skippa1
16th June 2014, 19:19
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
16th June 2014, 19:38
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
17th June 2014, 14:23
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
17th June 2014, 14:52
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
17th June 2014, 14:52
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
17th June 2014, 18:41
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
17th June 2014, 19:50
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
18th June 2014, 18:05
Now now spyda I know you own a chopper so you are now in my world.
BIG DOUG
18th June 2014, 18:08
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
18th June 2014, 19:19
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
19th June 2014, 19:52
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
19th June 2014, 22:56
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
20th June 2014, 06:47
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
20th June 2014, 07:34
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
20th June 2014, 20:04
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
20th June 2014, 22:33
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.
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