After market exhaust?

S

Scratchy

Member
Hi All,
I just happened to purchase a used CBR125R 2012. Upon looking at it I see that there is likely an aftermarket exhaust, can somebody confirm that for me?
And what brand does it look like as there is no markings on it.
Bike runs very well and I was able to gain 110km/h on it without any issue and it seemed like it would go further too. Thanks
 

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Scratchy said:
Hi All,
I just happened to purchase a used CBR125R 2012. Upon looking at it I see that there is likely an aftermarket exhaust, can somebody confirm that for me?
And what brand does it look like as there is no markings on it.
Bike runs very well and I was able to gain 110km/h on it without any issue and it seemed like it would go further too. Thanks
Click to expand...
Aftermarket exhaust isn't necessarily an issue. If it is really small (gp exhaust) or has no muffler, expect to get some noise tickets. If it is at least 18" long and has some absorption/baffles I wouldn't expect an issue (assuming they didn't screw up fueling but you would notice that when your rode it). If it has no markings, it is aftermarket. Stock cans have compliance information stamped in.

GTAM doesn't host pics well. Use imgbb or imgur to upload pics and then link in your gtam post.
 
Yes, that is an aftermarket exhaust, and from the size of the "muffler", probably a very loud one. It is hard to keep a single-cylinder engine quiet, particularly a hard-working one, and a CBR125 engine is hard-working any time the bike isn't stopped.

The thing that we can't tell from the picture, is whether this is a "slip-on" that retains the front muffler and catalyst-box underneath the bike, in which case the noise level is probably passable, or whether it is a "full system" with just straight pipe from the engine back, in which case it is surely obnoxiously loud.

It won't be a recognised brand name. It will be a cheap ebay/alibaba special. The bike will likely run better with the stock exhaust.
 
Scratchy said:
Thanks, doesn't sound that loud to me. How do I check if its a slip on or not?
Click to expand...
Brian knows that bike much better but typically there is a box right at the bottom of the bike. If you can see 2" round pipe all the way from the cylinder head to your can without any big boxes/cans in it, you've got a full system.
 
Take another photo, from the front (turn the steering to the side so that you can get your camera in where the opening behind the front wheel is). Take the picture down low (bottom of engine) pointing towards the back, to show what the path of the exhaust pipe coming out of the engine towards what can be seen in the previous photo.

The stock one has a big container underneath the engine, which is the pre-muffler and it's where the catalytic converter lives, and it's painted matte black, although the downpipe from the engine is probably discoloured/rusty (they all do that).

If it's plain pipe, without a big container in the middle of it, it's aftermarket. If it's chrome-finished as opposed to matte black, it's aftermarket.
 
Aftermarket. The big hole in the bottom fairing is where the catalyst/pre-muffler normally lives.

Clamps like that have no business being in an exhaust system.

Without the pre-muffler, the header pipe (which comes down from the cylinder head) cannot be the correct length to be tuned properly.

Having said that ... if the bike runs okay, and you can put up with the noise, it won't do any damage to leave it there. On a positive note, it will be lighter than stock ... the stock exhaust system for that bike weighs (relatively) a ton for what it does.
 
Brian P said:
Aftermarket. The big hole in the bottom fairing is where the catalyst/pre-muffler normally lives.

Clamps like that have no business being in an exhaust system.

Without the pre-muffler, the header pipe (which comes down from the cylinder head) cannot be the correct length to be tuned properly.

Having said that ... if the bike runs okay, and you can put up with the noise, it won't do any damage to leave it there. On a positive note, it will be lighter than stock ... the stock exhaust system for that bike weighs (relatively) a ton for what it does.
Click to expand...
Thanks, I don't see the noise to be obnoxiously loud. If no damage or safety concern, I'll just leave it as is. Being my first bike, I am learning to ride and will likely switch it over to something bigger next year or so. Or I might keep it on top of what I will be getting, I paid $1900 for it with only 8K on the bike.
 
The noise testing limit is somewhere around 90 dBA, which is extremely loud. One of my bikes has a custom shorty muffler that was cut in half, as well as no mid-pipe between it and the headers, and it's still (barely) below the noise limit at idle.
 
Relax said:
The noise testing limit is somewhere around 90 dBA, which is extremely loud. One of my bikes has a custom shorty muffler that was cut in half, as well as no mid-pipe between it and the headers, and it's still (barely) below the noise limit at idle.
Click to expand...
Gotta start the bike and measure noise with an iPhone app.
 
Just ride it, you will be on your next bike in no time.
And when you buy your second bike - make sure it’s full stock, so you can modify it (or not) the way you want it :)
 
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