Cheap replacement Muffler

3395 Views 73 Replies 7 Participants Last post by Tamir, 6 mo ago

Big Cahuna

Discussion Starter · Apr 7, 2022

I've read everything available about the best muffler to replace that hulking beast hanging off the right side, but I'm not interested in sounding great or building a few HP's, I want that Nimitz class anchor gone. I know this bike will never sound or perform like an inline-4 liter bike so it's really pointless to spend $400 and up for a high quality titanium slip-on. Are there any sub $100 slip-ons that will not require me to get a Dyno with a complete ECU remap and that won't melt or explode in a ball of glowing-hot confetti? I've done the straight-pipe thing and that's too loud.

Also, does anyone know the pipe diameter? Additionally, I do not weld.

Essentially, I just want something that won't interfere with my swing-arm stand and has a half-life greater than one riding season.

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KeepTheFeather

· #41 · 7 mo ago

Also if you search Ebay and what not, they do sell cheap exhaust guards/heat shields. Motorcycle Exhaust Heat Shield Protector Black Universal Motorbike Guard Cover | eBay
like these for example. Theres many designs, the only problem is I assume during a crash because they use bands they might just fly out the exhaust :/

Oem guard uses hooks, so even at high speed, that bad boy is staying put.

Reactions: 2

Tamir

· #42 · 7 mo ago

KeepTheFeather said:
So I dont think its really worth having sliders on this particular bike.

Your complete explanation is really convincing. I think like you, and I know from experience that the original design guard the motorcycle in the most reasonable way. The weights at the end of the handlebars are sliders that Honda provides for free (build-in) as a part of all the design. My CBR motorcycle was skidded by the previous owners, and there are slight damage to the paint, on the central main cover, on the front wheel mudguard, and on the heat shield of the exhaust. The rear brake lever is also a little bended, and I bended back into place...small and tolerable defects.

Tamir

· #43 · 7 mo ago

KeepTheFeather said:
Also if you search Ebay and what not, they do sell cheap exhaust guards/heat shields. Motorcycle Exhaust Heat Shield Protector Black Universal Motorbike Guard Cover | eBay

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KeepTheFeather

· #44 · 7 mo ago

Tamir said:
Your complete explanation is really convincing. I think like you, and I know from experience that the original design guard the motorcycle in the most reasonable way. The weights at the end of the handlebars are sliders that Honda provides for free (build-in) as a part of all the design. My CBR motorcycle was skidded by the previous owners, and there are slight damage to the paint, on the central main cover, on the front wheel mudguard, and on the heat shield of the exhaust. The rear brake lever is also a little bended, and I bended back into place...small and tolerable defects.

Yeah the tip of my gear shifter was bent inwards, a mechanic tried bending it back out and broke it but welded it back into place for free!
The bike seems pretty crash friendly tbh. On both my crashes the front fairings were the only ones broken. The big side fairing was just scratched. They aren't cheap to replace but not the end of the world. Ive been looking for some used fairings for awhile with no luck. I think this bike is very rare where I live.

The handle bar ends are VERY strong. So strong that on one of my crashes the screw bent outwards with just some scratches to the bar end. You can buy lightweight bar ends as well. I found they make stability at high speeds a little worse but make it easier to turn the handlebars.

KeepTheFeather

· #45 · 6 mo ago

@bigcahuna would it be possible for you to post that video of the exhaust sound?

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KeepTheFeather

· #46 · 6 mo ago

Also does anyone know what the diameter of the inner end of the middle exhaust link is in mm?

Big Cahuna

Discussion Starter · #47 · 6 mo ago (Edited)

KeepTheFeather said:
@bigcahuna would it be possible for you to post that video of the exhaust sound?

Sorry 'bout that, I totally forgot.

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Tamir

· #48 · 6 mo ago

KeepTheFeather said:
Also does anyone know what the diameter of the inner end of the middle exhaust link is in mm?

PIPE, EX.
18320-KYJ-900
**I.D. = 35mm
**O.D = 38mm

GASKET, MUFFLER
18392-KYJ-901
**I.D. = 38mm
**O.D = 44mm

**These are nominal dimensions

KeepTheFeather

· #49 · 6 mo ago

2

Thank you!, In that case would a cbr300r mid pipe fit?

Like this one:

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DIMENSIONS:

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Is 42mm too wide?

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KeepTheFeather

· #50 · 6 mo ago

The gasket used is the same for both cbr250r and cbr300r, but the PIPE,EX of course isn't. But i'm assuming since the exhaust goes over the gasket does it really matter?

Tamir

· #51 · 6 mo ago

KeepTheFeather said:
Is 42mm too wide?

Size 42 does not fit. If you order a part that says it fits our model, and it doesn't fit, then you can open a dispute, attach photos with measurements, and get your money back. And, these kinds of changes require the ability to make adjustments...etc
In the comments here (Big Cahuna), the guy from https://www.aliexpress.com bought it and then wrote that the size doesn't fit...making such a custom change D.I.Y requires knowledge, ability, patience, and it takes time.

KeepTheFeather

· #52 · 6 mo ago

Pardon my stubbornness, but why does it not fit? Isn't the mid pipe supposed to go over the gasket?

I saw that comment, I also found this one with a good review:

https://pt.aliexpress.com/item/1005...00016207282252!sea&curPageLogUid=tQrJEsnYheJH

KeepTheFeather

· #53 · 6 mo ago

The reason i'm asking is because I wanted the blue finish on the mid pipe but I haven't found any with that finish for our bike

Tamir

· #54 · 6 mo ago

KeepTheFeather said:
The reason i'm asking is because I wanted the blue finish on the mid pipe but I haven't found any with that finish for our bike

It's a matter of free time, budget, and ability...Do It Yourself is a hobby, you can order when you know there is a degree of uncertainty, and then maybe make adjustments. Customization is a serious matter, there is a lot to know about this subject...learning takes time, and it costs money, mistakes also cost money. it is what it is.

Big Cahuna

Discussion Starter · #55 · 6 mo ago

Tamir said:
Size 42 does not fit. If you order a part that says it fits our model, and it doesn't fit, then you can open a dispute, attach photos with measurements, and get your money back. And, these kinds of changes require the ability to make adjustments...etc
In the comments here (Big Cahuna), the guy from https://www.aliexpress.com bought it and then wrote that the size doesn't fit...making such a custom change D.I.Y requires knowledge, ability, patience, and it takes time.

That review was mine and it turns out the pipe DID fit, but the clamp it came with was too big and didn't clamp it tight. I fixed the problem by putting a few mm gasket under the clamp and it worked. I could have just bought a smaller clamp but they were almost the price of the pipe and I felt I shouldn't have had to do that. It took almost a month to arrive so I really didn't want to be spending more months shipping parts back and waiting for more to arrive. That's the downside to AliExpress, most everything that doesn't fit into an envelope usually takes about a month to be delivered. It's great for buying things you WILL need in the future, but I use Amazon or Ebay for things I need within days.

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Tamir

· #56 · 6 mo ago

Big Cahuna said:
That review was mine and it turns out the pipe DID fit, but the clamp it came with was too big and didn't clamp it tight.

Big Cahuna

Discussion Starter · #57 · 6 mo ago

KeepTheFeather said:
Also does anyone know what the diameter of the inner end of the middle exhaust link is in mm?

Cold start video is uploaded. I'll post another video at higher RPM when I take it and get it warmed up.

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KeepTheFeather

· #58 · 6 mo ago

Thanks for the video!

95% of the time Aliexpress is cheaper than Ebay, however I have found better deals on ebay sometimes like for a tail tidy.

Ebay also refunds quicker and a bit more consistently than Aliexpress and items tend to arrive a bit earlier than Ali.

With that being said, I feel a lot of chinese sellers are shifting over to Aliexpress, and sometimes you will find things on there that aren't even on Ebay.
And sometimes price can be significantly better.

Reactions: 2

Tamir

· #59 · 6 mo ago

Big Cahuna said:
Cold start video is uploaded. I'll post another video at higher RPM when I take it and get it warmed up.

KeepTheFeather said:
Thanks for the video!

Sounds great. The two exhaust pipes in the back transmit much more power, it's like they do in 3-cylinder engines. In the picture:

Turn the clamp so that point A goes up.
Do not ride with zipper B. Make a rigid adapter from metal C.

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Big Cahuna

Discussion Starter · #60 · 6 mo ago

View attachment 45908
[/QUOTE]

Yeah, I was going make a bracket by using a strip of steel and drill press holes on the ends. The zip-tie is just so I don't lose it on the highway in case the clamp doesn't hold. It's pretty rigid and I might not need a bracket at all. It's a small unit and very light. I'll flip the clamp next time I'm down there with a wrench. It bothers me too.

KeepTheFeather said:
Pardon my stubbornness, but why does it not fit? Isn't the mid pipe supposed to go over the gasket?

I saw that comment, I also found this one with a good review:

https://pt.aliexpress.com/item/1005001459527247.html?spm=a2g0o.productlist.0.0.74923dc9nEFMJt&algo_pvid=7335654c-8ebd-4b5d-b8e6-1ddbe82d4ab0&algo_exp_id=7335654c-8ebd-4b5d-b8e6-1ddbe82d4ab0-0&pdp_ext_f={"sku_id":"12000016207282252"}&[email protected][email protected]!12000016207282252!sea&curPageLogUid=tQrJEsnYheJH

The pipe fit fine, the Clamp they sent me was too big so it didn't clamp down tight enough. In fact, it doesn't need a gasket. I just happened to have one that I wrapped around the pipe to make it thicker so the clamp would work. Yours may or may not arrive with the correct clamp. You can always buy another one if it's too big. I think they're around $10 or so if I remember.

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