Post your CB300F Exhaust and mods! - Honda CBR 300 Forum
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post #1 of 114 Old 09-02-2015, 12:22 AM Thread Starter
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Post your CB300F Exhaust and mods!

I'm in the market for a new exhaust and license plate bracket (Fender Eliminator)... and other cool mods...

I've been searching all over online and I am a bit shocked that we do not have a lot of options for this bike. I know that this bike is not as high demand as other bikes such as Grom, CBR300R/250R but I really think that CB300F is a great bike!

I've created a list that I found online for the exhaust:
Yoshimura R77
Scorpion Serket Parallel
Musarri
M4
Two Brothers Racing
MGP Exhaust
Coffmans
Leovince

I'm a type of person that likes the shorty exhaust, like the Taylormade exhaust (where the exhaust is hidden or shorty, as I think they are pretty slick) But I can't find anything like that other than the Coffmans. And I'm pretty skeptical about the Coffmans brands (I heard someone had overheating issue after installing them)

So I'm just wondering if any of you guys here installed an aftermarket exhaust? If so, post it and share it with us.

In another token, any of you guys know if CBR250R/CBR300R exhaust (slip-on/full) will fit for our CB300F? Does it need adjustment? If so, what kind? (welding? drilling?,...?)

Thanks guys! Now post your mod CB300F! Any mods will do!
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post #2 of 114 Old 09-02-2015, 04:49 AM
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Originally Posted by onair125 View Post

In another token, any of you guys know if CBR250R/CBR300R exhaust (slip-on/full) will fit for our CB300F? Does it need adjustment? If so, what kind? (welding? drilling?,...?)
Any CBR300R aftermarket slip on will fit your CB but 250R slip on's require modification as they are designed for the shorter header pipe of the 250R.
So you either chop down your 300 header or get a new mid/link pipe bent up to marry the 300 muffler to the 250 header.

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post #3 of 114 Old 09-03-2015, 12:42 AM
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See my sig.

My exhaust is a copy Akropovic made in Thailand. Full system was about $300 U.S.

I dropped in a hi-flo air filter and ripped out the intake snorkel.

Fuel controller to tune it.

It runs well. Bit more oomph down low and a lot more at higher revs.

I haven't noticed any loss in fuel mileage but since I'm putting in more fuel it can't be as good as stock.

CB 300F
Intake
Full Exhaust
EJK Fuel Controller

Last edited by tilac; 09-03-2015 at 12:48 AM. Reason: more info
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post #4 of 114 Old 09-03-2015, 01:41 AM
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removing the snorkel actually decrease air flow into the intake. It has a velocity stack design. The snorkel smooths the flow of air and being a honda, also is tuned with the motor and exhaust. With out the snorkel now the flow is very turbulent and is out of tune with the rest of the motor system. It does make it louder but don't associate loud with improved performance.
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post #5 of 114 Old 09-03-2015, 09:55 AM Thread Starter
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What kind of Fender Eliminator is that?
fit perfectly?
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post #6 of 114 Old 09-03-2015, 10:08 AM
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removing the snorkel actually decrease air flow into the intake. It has a velocity stack design. The snorkel smooths the flow of air and being a honda, also is tuned with the motor and exhaust. With out the snorkel now the flow is very turbulent and is out of tune with the rest of the motor system. It does make it louder but don't associate loud with improved performance.
I don't doubt you and to be honest I didn't remove it, the person that installed the fuel controller did. I'm not worried about it being out of tune because that's what the fuel controller was for.

I'd actually prefer my bike to be quieter but it runs so well I'm happy with it.

CB 300F
Intake
Full Exhaust
EJK Fuel Controller
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post #7 of 114 Old 09-03-2015, 10:11 AM
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What kind of Fender Eliminator is that?
fit perfectly?
Are you asking me? I bought it here:

???????? BASIC FOR CB300F / CBR300R #6143890

and also got a new rear light with integrated turn signals.

?????????? LED +????????????? FOR CB300F/CBR300R #6194988

Yes, it fits perfectly.

CB 300F
Intake
Full Exhaust
EJK Fuel Controller
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post #8 of 114 Old 09-04-2015, 01:02 AM
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I love shorty styled exhaust as well. I recently installed the tyga maggot full exhaust system.
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post #9 of 114 Old 09-04-2015, 01:10 PM Thread Starter
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Originally Posted by scyurs View Post
I love shorty styled exhaust as well. I recently installed the tyga maggot full exhaust system.
very cool!
I'm leaning toward Coffmans exhaust.
Other mods I'm planning to do:

- Replace that ugly fender. Awaiting for this guy to reply back to tell me where he's ordering it from. http://www.cbr300forum.com/forum/app...nder-grip.html

- FE, Frame slider, integrated tail light, fork chain and tank protector.

Will post picture upon completion.
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post #10 of 114 Old 09-21-2015, 09:09 AM
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Garage
Twobrothers exhaust! huge weight savings, and a "6% gain in HP"
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