Help with cutting exhaust pipe on F4
Thread Starter
Registered User
Joined: Jan 2006
Posts: 186
From: TEL AVIV, ISRAEL
Help with cutting exhaust pipe on F4
Hello
I have a 99 CBR 600 F4, and I opened today my old F4 pipe just to see how it looks from the inside, and I cant see how I can make it short enough so it wont hit the ground.
Here is the good pipe on the bike
This is the one I opened
I cut the end cup
and the part I want to remove
I have a 99 CBR 600 F4, and I opened today my old F4 pipe just to see how it looks from the inside, and I cant see how I can make it short enough so it wont hit the ground.
Here is the good pipe on the bike
This is the one I opened
I cut the end cup
and the part I want to remove
Last edited by Gilad; Jan 17, 2010 at 10:36 AM.
Registered User
Joined: Jan 2005
Posts: 547
From: bristol, connecticut
Re: Help with cutting exhaust pipe on F4
I cut mine from the front because its a hollow space. Mine still sounds stock. If you keep those pipes together it will stay quiet. The f4 one may be different though... There are tons of posts on this..
Thread Starter
Registered User
Joined: Jan 2006
Posts: 186
From: TEL AVIV, ISRAEL
Re: Help with cutting exhaust pipe on F4
this is what I think I can do with this pipe...
Do you think its short enough ?
The cut mark on the photo refer to the cut Ill do with the good exhaust.
Last edited by Gilad; Jan 17, 2010 at 11:16 AM.
Thread Starter
Registered User
Joined: Jan 2006
Posts: 186
From: TEL AVIV, ISRAEL
Re: Help with cutting exhaust pipe on F4
I saw this post
I can cut it more, he cut 6" I can cut without any problems 8", in the photo Its 7.1 but I can make is a little more.
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...
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...
NealFoReal
Joined: Oct 2006
Posts: 36,000
From: QUEENS, NY BITCHES
Re: Help with cutting exhaust pipe on F4
Ughhhhh no idea Gilad. I'll post a link in the NY thread to see if anyone can offer advice. I usually just cut through the H in the Honda at the back of the can and my pipes are always quiet 
KING annoyingeric
Joined: Jan 2007
Posts: 1,275
From: Queens
Re: Help with cutting exhaust pipe on F4
I love my pipe cut... It took me a while but I went crazy and kept to the OEM design with the chambers still being used as they were from the factory....
My pipe is 12 inches long, Cut 8 inchs off..
My pipe is 12 inches long, Cut 8 inchs off..
Last edited by Annoying Eric; Jan 19, 2010 at 09:33 PM.
Squid Supreme
Joined: Apr 2007
Posts: 1,660
From: Hot Springs, Arkansas
Re: Help with cutting exhaust pipe on F4
Just cut the front off. That way, all your stock internals will be left unaltered. Remove the mount, cut the pipe, weld it back, and weld the mount back on.
KING annoyingeric
Joined: Jan 2007
Posts: 1,275
From: Queens
Re: Help with cutting exhaust pipe on F4
I cut 4 inches on both sides. Then rear of the pipe I Bent the exit pipe so it met back up with the tip.. The front section is hollow but it also baffles the sound alot so 4 inches on both sides worked out perfect..
Registered User
Joined: Sep 2006
Posts: 97
From: Norway
Re: Help with cutting exhaust pipe on F4
https://www.stuntlife.com/forums/444...stock-f4i.html
I cut about 8 inches of the front, its really quiet, almost boring quiet. Requires cutting off and rewelding mount, but your gonna weld anyways so.
I cut about 8 inches of the front, its really quiet, almost boring quiet. Requires cutting off and rewelding mount, but your gonna weld anyways so.
FTP CYCLES
Joined: Oct 2008
Posts: 506
From: ft myers, fl, usa
Re: Help with cutting exhaust pipe on F4
I got a shortend yoshi rs-3 Stainless pipe for sale for a 99 F4... Got dings an dent in mid pipe but works Perfect and sounds AMAZING. P.M me if you want it.
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