SCOTT_Chychul

Sooo i know its easy to chop an aftermarket.. But i put a stock on, because im trying to be a stealthy midnight whisperer.. So whats the deal ? Same old chop the cap off,, then chop it how short you want it, then get someone who knows what they are doing to weld a perfect bead around it to seal the deal ? For my after market carbon fiber acpvc. i just drilled out the rivots and chopped it short and re rivited it.. but that wont work for this one...

-SKETCHY-

Yea Pretty Much.i Chopped My Stock On My 636 And It Is 3x Louder Than My Chopped Hindle,d&d.

SCOTT_Chychul

i havenet even opened up a stock one,, and i know honda's are different.. Fish has a chopped stock and its still stealthy.. ill have to ask him i guess

-SKETCHY-

My Hindle Was Quiet At First And I Repacked It When I Chopped It.it Seems To Get Louder Everyday.

SCOTT_Chychul

well maybe you used the wrong packing,, I used fmf 4 stroke dirtbike packing and it lasted 2 years before it got loud,,, you gota pack it toooighte..

-SKETCHY-

I Think I Used The Moose Packing.i Have Seen Some Of It Shoot Out The Pipe When I Start The Bike Up.

f4istunna

my stock chopped can isnt much louder than full length at all hardly noticed a difference. I cut it w/ a chop saw. i cut the cap at the factory weld then marked the can where it needed to be cut, chopped it honda has 3 little pipes inside the can cut them back about an inch from where the end cap will be then welded cap back on looks dope didnt effect how it runs at all. I'd try to use a chop saw if you can so the cut is straight makes it easier and better looking

mista_shrpnl

Yep, chopping a stocker wont make too much a differance in the loudness..

el nino

is that FIB in your avatar?

and i cut my 954 one and theres liek 4 pipes in there. its definitely not gonna be quiet for that reason plus the fact that the pipe is shorter so less muffler = more noise

kj

Alright, here's what you gotta do for a stocker honda... I figured this out the hard way by going through 2 stock pipes b4 getting it right. I like to be as quiet as possible, cause my lot is close to houses.

Those 4 pipes inside are important... if you just cut em and put the cap back on you will have a much louder pipe. I'll attach a pic of when I cut mine. I cut 6" off from the original end cap weld.

Here's the deal... there are 3 chambers inside the pipe. The first is where the inlet comes in... the sound waves bounce around in there, then go through one tube(the bottom one) that bypasses the second chamber and goes to the end where they bounce around some more. Then through the 2 tubes in the center that go back to the second chamber, bouncy bouncy, then it all exits through the top center tube out the end cap.

What you have to do is keep a few inches of the last chamber and seal that last exit pipe from the rest of em. I had my welder slap a plate on the end w/ just one hole for the top tube. Then put the orignal cap back on.

If you take the time to do it this way, it'll stay just about same loudness as stock. Slightly louder at wot. Leave those 4 tubes open and you may as well cut 12" off the pipe.

I'll try to get some better after pics but for now you get the idea...

CHAO5

Stock GSXR looks similar to that stock honda pipe inside, so the same should apply. I cut mine after that plate and it's pretty loud... especially under load. At idle it's got a nice deep tone.

rydn600f4

a really easy way to do it that doesnt look as good as the flush welds is to cut it back a couple inches from the tip...cut about 6in out...then cut a one inch wide ring off of the scrap piece....cut that piece across so it can expand enough to slip over your pipe...tack weld the 2 pieces of your pipe together then slip the ring over the joint and weld both sides....this makes it alot easier to weld because there is absolutely no gap...if you have the skills or acess to a good welder then do it the cleaner way listed above

SCOTT_Chychul

so in that pic,, you block the 3 bottom holes is what your saying ? how do you block them ? just stuff packing in or what ?

nickalltogether

he doesn't mean block them, but cut them further than the top pipe, and have the top pipe flush with the endcap.... or that's how i gathered it at least.

SlitZ

damn i didnt know it was all that technical... i was gonna cut that **** down and just tack it back on, glad i read all this

AzN~BoI_585

Ummm ok KJ954 can i just pay ya like 75 bux and u can send me a professional cut down stocky for and an F4i

On the real tho...i needa find a welder...

kj

Exactly. The top pipe has to be isolated and sealed from the rest. You can see in the pic how I cut them flush w/ the inner plate and left the top just long enough to stick out past the final cut.

It only cost me $45 at the local welding shop to get the plate and end cap welded up... so scrape up a few bucks and get your cuttin wheels out.

All this sh*t isnt really that important if you don't care about noise... but if you wanna keep it as quiet as possible, it's the only way to go.

AzN~BoI_585

oh snap if its only gonna be like 45 bux then thats fine.

I think most ppl eventually get tired of the loud ear ringing loudness and having ppl call u in for ur exhaust, drawing un-needed attention. Good info man :YEAH

f4istunna

Great description kj. Guess i coulda been a little more detailed i was kinda high. Thats exactly how mine ended up. He's right its quiet as stock mines just a little louder at low idle through the revs sounds about the same

-SKETCHY-

Kawi Pipes Are Easy And Simple!!!