Muffler ... what else ?

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Zigomatix
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Registriert: Fr Jan 10, 2020 5:25 pm

Re: NX250 muffler ... what else ?

Beitrag von Zigomatix » Di Jan 14, 2020 5:38 pm

Hi there,
I went to my friends and they can do nothing to weld the original muffler.
So I ordered the ebay one so they can weld it on the front part of the original.
I have a question for you Scrambler : Can you tell me the diameter of the arrow db killer cap Where the scew is) ?
Here, in france, I can find 45° stainless pipe with external diameter 51 mm and 1,25 mm thickness that mean 48.5 mm inner diameter :
https://lamtechno.com/coude-inox/280-co ... re-51.html
or external 54 mm thikness 2 mm so 50 mm inner diam
https://echapflex.com/coude-inox-a-soud ... 04_54_ep_2
Wich one will fit with the arrow ?
Thank you again.

Patrick

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scrambler
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Re: NX250 muffler ... what else ?

Beitrag von scrambler » Mi Jan 15, 2020 6:30 am

Zigomatix hat geschrieben:
Di Jan 14, 2020 5:38 pm
I went to my friends and they can do nothing to weld the original muffler.
Yes, my own experienced welder refused to weld any more NX250 mufflers, that’s why I had the idea with the ebay mufflers.

For the arrow db-killer you need something with at least 60mm inner diameter – something like this https://www.ebay.de/itm/Edelstahl-Bogen ... 1438.l2649
The outer diameter is 63,5mm or 2,5’’ inch

Bild

Zigomatix
Beiträge: 19
Registriert: Fr Jan 10, 2020 5:25 pm

Re: Muffler ... what else ?

Beitrag von Zigomatix » Do Jan 23, 2020 6:41 pm

Hi there,
I received the silencer from ebay. I cut the original muffler. It was easy as it is roasted.
I set the silencer with aluminium tape and started the engine.
DSC_0135.JPG
Wow what a lovly noise. If it is possible to add sound or video to the forum, I will do that.
But I borrowed a sound level meter at my work and it goes to 113 db at 6000 rpm. It is far too loud at this point. I haven't received the dB killer yet and will repost a new measure when it comes.

Again thank you for your help Scrambler.

Patrick
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scrambler
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Re: NX250 muffler ... what else ?

Beitrag von scrambler » Fr Jan 24, 2020 9:03 am

Zigomatix hat geschrieben:
Do Jan 23, 2020 6:41 pm
But I borrowed a sound level meter at my work and it goes to 113 db at 6000 rpm.
I promise it will be way less noise with the db-killer ;)

As for the Arrow muffler you mentioned https://www.car.gr/parts/view/24420268- ... misewn-0-0 it looks like it is a self made modification and it lacks two brackets for attaching it to the nX250 frame. And its expensive.
NX250 Arrow muffler.jpg
There are lots of mufflers for the AX-1 in Greece https://www.car.gr/parts/?models=Honda% ... ax1&ca=711 but nobody knows how they perform in terms of power and noise.

This one costs only 70€ but it also lacks one attachment point. And due to its small size the performance is likely not very good.
greek AX1 muffler.jpg
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scrambler
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Re: NX250 Muffler ... what else ?

Beitrag von scrambler » Fr Jan 24, 2020 9:27 am

bytheway: don't throw away the original NX250 db-killer. It can be used to repair a NX250 muffler and provides a bit more sound to a MD25 :)
dbkiller_nx250.jpg
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Zigomatix
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Registriert: Fr Jan 10, 2020 5:25 pm

Re: NX250 Muffler ... what else ?

Beitrag von Zigomatix » Fr Jan 24, 2020 9:40 am

scrambler hat geschrieben:
Fr Jan 24, 2020 9:03 am
I promise it will be way less noise with the db-killer ;)
OK I know it Will be less :D
scrambler hat geschrieben:
Fr Jan 24, 2020 9:03 am
There are lots of mufflers for the AX-1 in Greece https://www.car.gr/parts/?models=Honda% ... ax1&ca=711 but nobody knows how they perform in terms of power and noise.
Yes that is what I was affraid off !
Anyway I asked Arrow if they ever made a silencer for the NX 250 or AX-1 I am waiting for the reply...

Zigomatix
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Registriert: Fr Jan 10, 2020 5:25 pm

Re: NX250 Muffler ... what else ?

Beitrag von Zigomatix » Fr Jan 24, 2020 11:09 am

I received the answer from Arrow and it is a self made exhaust as expected.

Still waiting for the dB-killer...

jonathan
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Registriert: Fr Sep 13, 2019 12:11 am

Re: NX250 Muffler ... what else ?

Beitrag von jonathan » Mi Jan 29, 2020 11:20 pm

Zigomatix hat geschrieben:
Fr Jan 24, 2020 11:09 am
I received the answer from Arrow and it is a self made exhaust as expected.

Still waiting for the dB-killer...
To be honest, most aftermarket slip-on silencers can be made to fit really easily with a 'reducer' from an exhaust parts company. They can make more or less whatever ID/OD and length you need...nice to keep as much of the original as possible, but often the oem muffler is the first thing people change

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scrambler
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Re: NX250 Muffler ... what else ?

Beitrag von scrambler » Do Jan 30, 2020 7:03 am

jonathan hat geschrieben:
Mi Jan 29, 2020 11:20 pm
To be honest, most aftermarket slip-on silencers can be made to fit really easily with a 'reducer' from an exhaust parts company. They can make more or less whatever ID/OD and length you need...nice to keep as much of the original as possible, but often the oem muffler is the first thing people change
True, but some guys don't take into account that the NX250 needs a sturdy muffler since it is crucial for the stability of the rear frame. But almost all aftermarket mufflers are made of thin steel, riveted and attached with a clamp. That won’t work without a reinforcement of the rear frame.
Auspuff Griechenland AX1.jpeg
greek AX1 muffler
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Zigomatix
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Registriert: Fr Jan 10, 2020 5:25 pm

Re: NX250 Muffler ... what else ?

Beitrag von Zigomatix » Do Jan 30, 2020 12:04 pm

jonathan hat geschrieben:
Mi Jan 29, 2020 11:20 pm
To be honest, most aftermarket slip-on silencers can be made to fit really easily with a 'reducer' from an exhaust parts company. They can make more or less whatever ID/OD and length you need...nice to keep as much of the original as possible, but often the oem muffler is the first thing people change
Yes absolutely, I found nearby some guys that could weld anything I want including a standard silencer on any pipe ...
But I would like to add to scrambler's reply that I realy need my bike to be as quiet as Honda made it. I have to go to work early (6 am) and don't want my wife, kids and Neighbors to be awaken :D
Finaly I will add that playing with exhaust often results in power loss.
On my '98 600 Bandit, all the aftermarket exhausts were worst that the original exept one.
Japanese has lots of engineers and some of them are to design exhaust. It is a realy hard work to get something quiet and powerfull.

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