Aftermarket slip-on exhaust- - Honda CBR 300 Forum
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post #1 of 25 Old 04-12-2015, 03:44 AM Thread Starter
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Aftermarket slip-on exhaust-

I've owned a number of "full systems" as well as many slip-on "cans." You can spend a ton of cash for a very small amount of useable performance in a given RPM range and for me, that just doesn't work.
Looks may be another factor but the way I see it, the stock exhaust is stylish, down only .4 HP, won't bring the cops running every time you gas it and since I won't be riding to often at 9,000 rpm, I'll spend my money ($350) on something that I would consider more important or of greater value; like ten nice dinners at a cozy restaurant with my wife.
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post #2 of 25 Old 04-12-2015, 03:58 AM
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I totally agree with you "Pork Chop".
You can do 60mph and it sounds like 40mph to a policeman with a standard exhaust.
With an aftermarket 40mph sounds like 60mph.
In my teens I thought it was a way to impress the girls but now I'm old and wise.
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post #3 of 25 Old 04-12-2015, 09:06 AM
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I guess it depends on your point of view.

Looking at the twobros exhaust $680 gets you a 5.7% increase in power and a roughly 3% reduction in overall weight.

Working on the idea that the increases are valid of course.

If I could get those same percentages out of a performance part for my car, I'd gladly spend the $680.
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post #4 of 25 Old 04-12-2015, 09:46 AM
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I don't know that an exhaust that makes more noise would bring the cops running necessarily. My experience is that they tend to leave you alone unless you are acting like a total squid.

I would argue that it's better to have a louder exhaust because, as they say in the MSF course, you want to be seen and heard by the drivers around you. Whatever makes your presence known makes you safer on the road.
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post #5 of 25 Old 04-12-2015, 11:37 AM
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in sunny cal. a modified exhaust will get you a large fine as the new Hondas all have cats in the mufflers.
imo
loud pipes just you sound like a Harley rider, you can't here them coming, only as they go by and long after they'er gone.
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post #6 of 25 Old 04-12-2015, 02:00 PM
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Originally Posted by sleepless95453 View Post
in sunny cal. a modified exhaust will get you a large fine as the new Hondas all have cats in the mufflers.
imo
loud pipes just you sound like a Harley rider, you can't here them coming, only as they go by and long after they'er gone.
Every time I learn something new about California, it makes me less inclined to ever want to live there.
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post #7 of 25 Old 04-12-2015, 10:12 PM
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not all are motivated by a few extra horses..
my cbr250r had a leo vince evoII eu approved carbon s/o
which was way lighter than the stock anchor, fitted as if
it was designed for the bike rather than an add-on,
thus had a co-ordinated visual appeal as well..
esp on the all black motorcycle..
it had both db killers in and could be ridden
fairly quietly when necessary, such as early
morning starts.. but would be heard when
loaded, such as overtakes etc..
i could live with that..

however first time i burned my knuckle placing
rear disc lock on new cbr300r [a real burn in only
a brief contact, i thought there was something wrong
with the engine, posting here for advice from members..
responses confirming that this burning heat is 'normal'...

apparently the cat process' inside cause this excessive heat..
couldnt put my cover over it for fear of touching/melting it..
but the idea of ever having the bike on top of me, or onto
a pillion passenger, aside from any thought of power
or appearance, made up my mind about another
good quality well made slip on..
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post #8 of 25 Old 04-25-2015, 03:51 AM
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You can purchase an expensive and loud full exhaust, or you can purchase an aftermarket header only, then find a Titanium Silencer on eBay from one of the other bigger CBs that has the same (or similar) mounting holes and pipe diameter, then have a speed shop throw together a custom mid-pipe for a grand total of less than $600.

The benefits are better performance than OEM, lighter weight than OEM, stock look (complete with the Honda stamping on the silencer!) and the same or very close to the same sound level as stock. I installed the FMF header, Titanium Gixxer600 silencer, and custom mid-pipe for a grand total of $585 and only went up .5dB on my exhaust sound level on my DR650

I like Carbon fiber as much as the next guy but I laid my bike down several times off-roading and I think the Titanium held up far better than CF would have.

Just my .02
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post #9 of 25 Old 04-26-2015, 03:22 PM Thread Starter
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Big Buck$... and once again, not much of a performance gain but that's up to the individual, of course! Matter of fact, using a larger (600 or 750 can on a 286cc engine) could cause a loss of power but only the dyno could reveal that. Good luck on future projects!
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post #10 of 25 Old 04-27-2015, 12:38 PM
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I did in the past all after market jets-carb mods, slip-on and open air box on a DR650. At the end it was wonderful for me !

When i started the bike at 6:00am for the first time, all the windows were opened on the house, wife and kids went out of bed mad at me. My neighbors, probably too.

Harley says"Loud pipes saves lifes" No way !

One guy near my house bought a sport bike with a loud pipe and i felt in the same way. Grrrrrrrrrrr about that pipe.

Each ride was a stress to open gaz without a cop around.
So my full mod DR650 went out 2 years ago.

My CB300F will stay stock on that part. Nobody ear me going out or in the garage. Look sweat anyway.

Yvan says: Stock pipe save money !
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