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Discussion Starter #1 (Edited)
UK based owner here, with a 2017 SF MSX/GROM.
I'm looking to get a new exhaust/full system as I want to improve the looks & sound, I'm not bothered about any performance increase, so I'd like to keep the cost down.

I'm seriously looking at these eBay/Amazon/Chinese 'no-name' low mount full systems but would like opinions (please no flaming!), and possibly word from anyone with real world experience of using one?

Thanks, Z.
 

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Alright Z, I have what most would consider a cheap shitty A.R pipe, I had a more expensive but louder one fitted prior, if your not bothered about performance (I don't think with a standard engine and modded air box a pipe no matter how much it costs is going to make that much difference) and just want to change from the standard heavy cat pipe for looks and to make more noise the cheap pipe they have on e-bay for £75.00 will do fine. buy one run it if it stays together happy days if not get a more expensive one at the end of the day it's £75.00. I'll bet if you ride over the winter and clean the salt off it will last long enough that if you break it down on cost v miles covered it will be nothing.
good luck with whatever you go for.
 

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I can confirm that a good exhaust, intake and fuel controller or ECU reflash definitely affects performance in a good way.

If you just want a noise maker then a cheap exhaust will do. But there's no guarantee it's not going to fall apart. Lots of people love their cheap exhaust and then others have had them fall apart.
 

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Thanks Davey & 50-50.

I fully expect that a cheap one will require extra TLC to keep it running.

In terms of the health of the bike (mechanically) I shouldn't expect any negative effects using a cheap system over a pricey one?

When installing would it be worth doing an ECU reset for good measure? I forgot to mention but the bike is stock apart from cosmetic mod's.

Specifically, this is the one I'm dancing around.. https://www.ebay.co.uk/itm/Honda-MSX-125-Grom-ABS-Complete-Exhaust-System-2017/362629328287

ex.jpg
 

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(I don't think with a standard engine and modded air box a pipe no matter how much it costs is going to make that much difference)
LOL, not exactly accurate. I have two SF Groms and when I did nothing but add a full Yosh RS2 pipe to one of them, it just walked away from the other Grom. Night and day difference in power (and of course sound). A quality pipe makes a BIG difference in power (and torque).

Now the OP doesn't care about power, so the Zoom or the really cheap pipes will work. Here is a pic of someones that I captured, but I can't remember the name of the pipe. I thought it was one of the less expensive ones. Someone will chime in, I'm sure.

389C3D28-F660-44AE-A1A9-176ADCA57054_1517723291389.jpeg
 

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LOL, not exactly accurate. I have two SF Groms and when I did nothing but add a full Yosh RS2 pipe to one of them, it just walked away from the other Grom. Night and day difference in power (and of course sound). A quality pipe makes a BIG difference in power (and torque).

Now the OP doesn't care about power, so the Zoom or the really cheap pipes will work. Here is a pic of someones that I captured, but I can't remember the name of the pipe. I thought it was one of the less expensive ones. Someone will chime in, I'm sure.

View attachment 83340
That's the old AR or generic shorty pipe,

With regards to your 2 bikes, I'm sure the pipe helped out as the ones I fitted to my bike did. But it's been debated lots of times on this forum that no two bikes are alike when it comes to power & speed, Cisco has two grom's and I'm sure in standard form one was faster than the other, I also recall one member it may have been Paulltergeist who put a pipe on and found it made less power speed than his stock one. I'm talking about basic airbox mod and pipe only here no fuel controller, intake, re-flash etc.

In real world terms just how BIG of a performance upgrade are we talking about really, surly no one is gaining massive MPH or BHP from the basic air box mod and pipe are they?
 

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That's the old AR or generic shorty pipe,

With regards to your 2 bikes, I'm sure the pipe helped out as the ones I fitted to my bike did. But it's been debated lots of times on this forum that no two bikes are alike when it comes to power & speed, Cisco has two grom's and I'm sure in standard form one was faster than the other, I also recall one member it may have been Paulltergeist who put a pipe on and found it made less power speed than his stock one. I'm talking about basic airbox mod and pipe only here no fuel controller, intake, re-flash etc.

In real world terms just how BIG of a performance upgrade are we talking about really, surly no one is gaining massive MPH or BHP from the basic air box mod and pipe are they?
While Groms do vary simply through manufacturing variances they are typically close in performance not including outliers.

It's rare that a modern 4-stroke benefits from an airbox and exhaust mod because they come so lean from the factory.
 

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Thanks Davey & 50-50.

I fully expect that a cheap one will require extra TLC to keep it running.

In terms of the health of the bike (mechanically) I shouldn't expect any negative effects using a cheap system over a pricey one?

When installing would it be worth doing an ECU reset for good measure? I forgot to mention but the bike is stock apart from cosmetic mod's.

Specifically, this is the one I'm dancing around.. https://www.ebay.co.uk/itm/Honda-MSX-125-Grom-ABS-Complete-Exhaust-System-2017/362629328287

View attachment 83338
That one should be just fine. :)

Regardless of which exhaust you choose, your engine will ONLY respond to TWO things... the length and diameter of the head pipe. That's all and nothing else. Mufflers are irrelevant to performance and are only for appearance and sound. Long head pipes produce more low rpm torque. Short pipes produce more high rpm horsepower. Small diameter head pipes work best for stock displacement engines. Large diameter head pipes work best for BBKs.

I ride for efficient economical transportation so I want all the low rpm torque I can get, and that's why I chose TOCE because it has longest small diameter head pipe of any exhaust. I average 145 miles per gallon using this exhaust.

IMG_1181.JPG

While there is a performance difference in long and short exhausts, it isn't a huge one, so choose whichever one you like the appearance and sound the most. :)
 

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Regardless of which exhaust you choose, your engine will ONLY respond to TWO things... the length and diameter of the head pipe. That's all and nothing else. Mufflers are irrelevant to performance and are only for appearance and sound.
That's 100% not true. Mufflers do affect flow and therefore performance.
 

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I think Tooter"s response "regardless of the muffler" is regarding mufflers that have a large baffle screen. All aftermarket mufflers that I have seen, have a muffler ID the same size as the pipe before it. In this case Tooter is correct. Now if you want to talk stock OEM muffler that is not true, but I do not believe Tooter was thinking of such a restrictive system when he made that comment.

Please carry on...
 

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If you go the Ebay/Amazon route. Just weld the header flange to your pipe to prevent it from falling apart when your riding. Besides that, after a year the muffler will be blown out and it will sound worse but for the price just buy another.
 

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I think Tooter"s response "regardless of the muffler" is regarding mufflers that have a large baffle screen. All aftermarket mufflers that I have seen, have a muffler ID the same size as the pipe before it. In this case Tooter is correct. Now if you want to talk stock OEM muffler that is not true, but I do not believe Tooter was thinking of such a restrictive system when he made that comment.

Please carry on...
Correct. All the aftermarket mufflers are way large so as to make the engine sound deeper. None of them are restrictive.
 

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That's flatout wrong and that's a fact. Mufflers reduce sound by way of back pressure. This is a restriction. If there was no restriction from the muffler the noise level wouldn't be reduced and then it wouldn't be a muffler.
It's ok for us to each have a different view. I'm totally ok with that. :)

In my opinion, aftermarket mufflers reduce sound by providing a place for the sound waves to go. They pass through the perforated core and are absorbed by the packing material. Because the perforated core is at least as large as the head pipe diameter, they don't actually create any backpressure. Adding a DB killer reduces sound by making the flow indirect when it leaves the muffler. So while the diameter of the head pipe increases in the direction of exhaust flow, the opening of the DB killer itself exactly matches the diameter of the head pipe as it leaves the engine so as not to restrict it.

 
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