Advice on aftermarket exhaust

[FJRider]

Ive seen it all with carbs where they have to rejet it but with Fuel Inj just air filter might do the job?

A change in Air Filters ... changes the Fuel/air mixture too ...

I might suggest you get knowledgeable advice on if slip-on/air filter changes can be done with no issues ... in respect to the fuel injection system.

[Motu]

pipes send noise behind you.
cars in front or beside wont notice it till you're past them.

So you can only hear a motorcycle from the rear ?

[mossy1200]

So you can only hear a motorcycle from the rear ?

Driving a car with stereo on I don't hear them until they are just about to pass. Saying that I tend to notice the headlight well before then.

[Gremlin]

Just a bit of advice. I ride more than I drive. Odds are pretty good I've done more km than you on bikes too, so anyway, I'm bike aware. Was in a mates van (him driving), window down, 50kph zone, and I only heard a bike come past literally as he came past, nothing before. So stop assuming a magic pipe is going to fix any problems.

1, Cars pull out in front of trains and trucks, so don't ever assume they're going to see a bike.
2, Check your road position. If it's intersections, are you making yourself visible. Lane changes, are you riding in their blind spot?

[mathornet]

fuck sake mate, your question was answered in the first reply.

Haha thanks mate I read it but I needed other peoples opinion too. Thanks for ya feedback

[jellywrestler]

if cagers dont know you are there and they go for that turn you're a goner.

this is what your horn is for, clown

[F5 Dave]

Feel like a dick doing it but I do that swerve from side to side thing to make sure the headlight catches a car at an intersection if I think they haven't seen me. . .

What this guy sez.

unless your pipes are facing forward cars won't notice the noise until you are past. Forget the noisy pipe, waste of money and faulty logic.

[mossy1200]

this is what your horn is for, clown

http://www.trademe.co.nz/motors/moto...-756566439.htm

And cheaper than a slip on also.

[AllanB]

It's a Hornet 250. 4 cylinder.

So I propose to cover all posts that you forget the slip on muffler and head down to your local muffler shop. Cut off the headers before they merge so there are four straight pipes. Four of them.

Now get your muffler shop to grab four lengths of the same size pipe as the headers and bend them up so that each header faces: forward, left, right and behind the bike - four straight pipes each facing in four directions.

Lets see a driver tell you they did not hear you now.

[mossy1200]

It's a Hornet 250. 4 cylinder.

So I propose to cover all posts that you forget the slip on muffler and head down to your local muffler shop. Cut off the headers before they merge so there are four straight pipes. Four of them.

Now get your muffler shop to grab four lengths of the same size pipe as the headers and bend them up so that each header faces: forward, left, right and behind the bike - four straight pipes each facing in four directions.

Lets see a driver tell you they did not hear you now.

You would only need a rear one if you ride slow?
Start by buying a 675 and go for front and sides only would save money on pipe?

I knew this thread would end up with sound advice.

[nzspokes]

It's a Hornet 250. 4 cylinder.

No its a 2009 CB400SF REVO.

Gut the stock can.

[Motu]

Was in a mates van (him driving), window down, 50kph zone, and I only heard a bike come past literally as he came past, nothing before.

Stock exhaust system ? If it was a modern bike with a quiet exhaust I might've missed it too. But if it had a non standard system I will have picked it up before it got to my car. I don't listen to music in the car...I don't listen to people either.

My bike is in a constant state of change - at the moment it has the quiet stock twin muffler set up, 2 weeks ago it had a single reverse cone megaphone, and 2 weeks before that a IDS2 Supertrapp. I can say that most certainly my quiet black BMW is not noticed, but the noisy black one get's their attention, I can see their ears pick up as I approach, sometimes they pull over a bit. Never on that quiet bike.

[mathornet]

Stock exhaust system ? If it was a modern bike with a quiet exhaust I might've missed it too. But if it had a non standard system I will have picked it up before it got to my car. I don't listen to music in the car...I don't listen to people either.

My bike is in a constant state of change - at the moment it has the quiet stock twin muffler set up, 2 weeks ago it had a single reverse cone megaphone, and 2 weeks before that a IDS2 Supertrapp. I can say that most certainly my quiet black BMW is not noticed, but the noisy black one get's their attention, I can see their ears pick up as I approach, sometimes they pull over a bit. Never on that quiet bike.

Thank you! that's what I've been trying to say!. Needless to say most people is disagreeing with this statement :/

This is my baby btw

[AllanB]

No its a 2009 CB400SF REVO.

Gut the stock can.

Still a IL4 but 150cc more of noise than a 250

[mossy1200]

Thank you! that's what I've been trying to say!. Needless to say most people is disagreeing with this statement :/

This is my baby btw

Noted.

But what people are trying to state is its most likely the driver who is in a state of little or no awareness while driving is the one that will get you(or nearly get you) unless your playing your A game.

Be honest with yourself.

You want a horny sound to come out of your bike.
You don't need any other reason. That in itself is reason enough. It may increase the chance of accident avoidance a little but not as much when the enemy is likely driving by brail while texting a friend with the sounds up high while high and possibly drunk.