OP
UTC

Lurker
2023 Vespa GTS
Joined: UTC
Posts: 2
Location: istanbul
 
Lurker
2023 Vespa GTS
Joined: UTC
Posts: 2
Location: istanbul
UTC quote
Hello,

I have installed the Arrow Urban exhaust on my 2023 GTS 300 scooter. There are two types of dB killers designed by Arrow for this particular silencer that I'm aware of. In the attached picture, the one that came with my silencer is the lower one. The upper one is also available for purchase.

Does anyone know how these two may differ in terms of sound or performance?
Forum member supplied image with no explanatory text
@safis avatar
UTC

Ossessionato
1979 P150X, 1983 P200E, 1987 PK125XL Elestart, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: UTC
Posts: 4317
Location: Veria, Greece
 
Ossessionato
@safis avatar
1979 P150X, 1983 P200E, 1987 PK125XL Elestart, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: UTC
Posts: 4317
Location: Veria, Greece
UTC quote
Top one should be louder, bottom one looks more muffled probably cause of Euro 5…
@steelbytes avatar
UTC

Veni, Vidi, Posti
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
 
Veni, Vidi, Posti
@steelbytes avatar
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
UTC quote
SaFiS wrote:
Top one should be louder, bottom one looks more muffled probably cause of Euro 5…
the bottom one with the holes is the same as the one in my Euro 4 Arrow Urban
(53525ANN).

Edit: I checked by sticking an endoscope camera in there
⚠️ Last edited by SteelBytes on UTC; edited 1 time
UTC

Ossessionato
2018 GTS Super
Joined: UTC
Posts: 2123
Location: Googleville
 
Ossessionato
2018 GTS Super
Joined: UTC
Posts: 2123
Location: Googleville
UTC quote
Bigger hole will always be louder, less restrictive. Looks like you could get pretty close to the accessory part by just cutting the end off the one you have.
@motovista avatar
UTC

Veni, Vidi, Posti
GT 2.4
Joined: UTC
Posts: 9026
Location: Watts, Cherokee Nation
 
Veni, Vidi, Posti
@motovista avatar
GT 2.4
Joined: UTC
Posts: 9026
Location: Watts, Cherokee Nation
UTC quote
Make sure the photo you're looking at is what you'll get. A lot of times, manufacturers change the product without updating the photo, or dealers will use the first photo they received or took, even though the product has changed. You might get the same product, no matter where you get it.
UTC

Hooked
300gts super sport
Joined: UTC
Posts: 121
Location: N.Wales
 
Hooked
300gts super sport
Joined: UTC
Posts: 121
Location: N.Wales
UTC quote
In the lower one the sound waves are being split and forced to change through 90 degrees to enter the side holes whilst a small portion ( the tuning) go straight through. On the top two there is no side attenuation just the restriction. So I would expect a deeper louder more distinct sound where each exhaust pulse can be heard.

The best thing about removable db killers is you can swap back to stock, which most folk want to do as the drone of an un silenced zorst gets very tiring on a long run.

Now if it was a Pops Yoshimura on a four cylinder screamer……thats a different kettle of fish 🙉
@steelbytes avatar
UTC

Veni, Vidi, Posti
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
 
Veni, Vidi, Posti
@steelbytes avatar
2019 GTS300 Supertech E3 60,000km
Joined: UTC
Posts: 5710
Location: Batmania aka Melbourne, Australia
UTC quote
Binettasteve wrote:
The best thing about removable db killers is you can swap back to stock, which most folk want to do as the drone of an un silenced zorst gets very tiring on a long run.
I don't often ride in groups but when I was behind the guy who had no baffle (think was a malossi) it was not nice riding behind him.
OP
UTC

Lurker
2023 Vespa GTS
Joined: UTC
Posts: 2
Location: istanbul
 
Lurker
2023 Vespa GTS
Joined: UTC
Posts: 2
Location: istanbul
UTC quote
Binettasteve wrote:
In the lower one the sound waves are being split and forced to change through 90 degrees to enter the side holes whilst a small portion ( the tuning) go straight through. On the top two there is no side attenuation just the restriction. So I would expect a deeper louder more distinct sound where each exhaust pulse can be heard.
I assumed the same, but after reaching out to Arrow support, they informed me that despite the different designs, the backpressure remains same and there is no variation in noise and performance between the two.

I'm not seeking additional noise, as the Arrow already generates considerable sound even with the baffle. It's enjoyable for city rides, but on highways, especially where there are hills, it can become tiring.
DoubleGood Design banner

Modern Vespa is the premier site for modern Vespa and Piaggio scooters. Vespa GTS300, GTS250, GTV, GT200, LX150, LXS, ET4, ET2, MP3, Fuoco, Elettrica and more.

Buy Me A Coffee
 

Shop on Amazon with Modern Vespa

Modern Vespa is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com


All Content Copyright 2005-2024 by Modern Vespa.
All Rights Reserved.


[ Time: 0.0116s ][ Queries: 4 (0.0046s) ][ live ][ 313 ][ ThingOne ]