How to make the Two Bros exhaust more quiet

[christod1]

Hi. Some of you gents and ladies might have read my thread regarding the sale of my new Two Bros exhaust. Actually I don’t want to sell them and I should have asked my friends on the forum this question before decided to put them up for sale. I haven’t sold them yet so is it possible to quieten down the Two Bros exhaust? Keep in mind that I have installed the DB killers. Please help. I dont want to sell them...

[MarcW]

put in earplugs

[MarcW]

hehe. well, i read on here on another thread, that i cant seem to find right now, that the two bros pipes come very sparsly packed from the factory. go get some 4 stroke packing, and repack them. ill look for the thread for a minute more

edit- http://www.fz6-forum.com/forum/fz6-m...s-exhaust.html (Attn: Two Brothers Exhaust!)

[bd43]

Weird that you ask because I am still adjusting to the higher level of exhaust sound too. I been using my sound meter and have done some tests. I can say that the P1R's do not have any effect on the level at idle. I was too chicken to rev it on my driveway and have the neighbors come after me so I can't comment on their effectiveness at higher RPM. Having said that, I have returned my P1R's to Two Brothers for some P1's which they claim will help. The opening on the P1R's are 1.89" while the P1's have a 1.5". The smaller the port opening, the more reflection of sound within that will cancel some of the sound waves. I'm waiting so can't confirm the port size or effectiveness.

I took the exhaust out for a spin tonight and a buddy of mine said it sounded like a Honda Civic with big a$$ pipes on it. Not the comparison I was looking for. When I'm moving at 50kph and higher, the sound is not bad at all, and I wear ear plugs (no dB killers in at the moment).

Sorry, really not answering your question here.

bmccrary did mention repacking the canisters from this post...

http://www.fz6-forum.com/forum/76815-post20.html

I'm not at that point yet but if the P1's don't perform, I might try reducing the opening by placing a disc in there. It would give more back pressure (similar to the stock exhaust) and provide even more wave cancelling.

Just my thoughts. I thought ADMIN mentioned that someone was doing the disc thing.

Hang in there, I'll hopefully get the new tips by the end of next week and will let you know how they work.

On the upside, the exhaust does look sweet.

[christod1]

Originally Posted by biker_dude43

Weird that you ask because I am still adjusting to the higher level of exhaust sound too. I been using my sound meter and have done some tests. I can say that the P1R's do not have any effect on the level at idle. I was too chicken to rev it on my driveway and have the neighbors come after me so I can't comment on their effectiveness at higher RPM. Having said that, I have returned my P1R's to Two Brothers for some P1's which they claim will help. The opening on the P1R's are 1.89" while the P1's have a 1.5". The smaller the port opening, the more reflection of sound within that will cancel some of the sound waves. I'm waiting so can't confirm the port size or effectiveness.

I took the exhaust out for a spin tonight and a buddy of mine said it sounded like a Honda Civic with big a$$ pipes on it. Not the comparison I was looking for. When I'm moving at 50kph and higher, the sound is not bad at all, and I wear ear plugs (no dB killers in at the moment).

Sorry, really not answering your question here.

bmccrary did mention repacking the canisters from this post...

http://www.fz6-forum.com/forum/76815-post20.html

I'm not at that point yet but if the P1's don't perform, I might try reducing the opening by placing a disc in there. It would give more back pressure (similar to the stock exhaust) and provide even more wave cancelling.

Just my thoughts. I thought ADMIN mentioned that someone was doing the disc thing.

Hang in there, I'll hopefully get the new tips by the end of next week and will let you know how they work.

On the upside, the exhaust does look sweet.

Thanks. They do look so sweat and I do not really want to sell them. What I have noticed that at about 4000rpm and up to 6000rpm they are not so loud. It's like they are "tuning in" at those rpm's. Actually I might try the disc thing as well. Thanks again...

[jsp]

Originally Posted by christod1

Thanks. They do look so sweat and I do not really want to sell them. What I have noticed that at about 4000rpm and up to 6000rpm they are not so loud. It's like they are "tuning in" at those rpm's. Actually I might try the disc thing as well. Thanks again...

In my honest opinion, If you really like them you should consider that you can find a way to reduce noise.

[christod1]

Originally Posted by jsp

In my honest opinion, If you really like them you should consider that you can find a way to reduce noise.

I am truly considering trying to find a way to reduce the noise ...Actually I'm going to put the sale on hold for now until I can test this...

[MarcW]

i am awaiting my two brothers delivery this week hopefully i got mine to be heard. there is not a day that i have not almost been hit because the stock FZ is so damn quiet. i am exited for the performance gains also, since my riding partner has a modded R1. i say try the repack thing. that is gonna be one of the first things i do. packing is (relatively) cheap, and if it makes a huge difference, its worth it.

[lonesoldier84]

very easy solution:

[christod1]

Originally Posted by lonesoldier84

very easy solution:

Not a bad idea....