Silencer exhaust muffler inside photo kz440 81

  • F64
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23 Apr 2020 11:45 #824067 by F64
Silencer exhaust muffler inside photo kz440 81 was created by F64
Pulled the silencer out of the exhaust thinking I could re-pack the perforated tube.. SURPRISE! Anyway, a photo just in case anyone was curious.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
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23 Apr 2020 14:54 - 23 Apr 2020 19:22 #824097 by martin_csr
Replied by martin_csr on topic Silencer exhaust muffler inside photo kz440 81
I saw this baffle on EB. not sure if it's still available. I've had the photo for a while.
The 2nd pic is of a 750-4 muffler that broke off. The muffler itself has additional baffling of course.

[img


KZ750-H2 Ltd. EB pic.
[img
1981 KZ650 Competition Sports and Road
Last edit: 23 Apr 2020 19:22 by martin_csr.

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23 Apr 2020 19:50 #824110 by F64
Replied by F64 on topic Silencer exhaust muffler inside photo kz440 81
pretty cool.
I bought some perforated pipe and packed it. I'm sure my reflected wave back to the valve is all messed up, but it sounds ok and lambda is within range.
I posted just in case someone had a kz440 and wondered what was beyond those 3 welds.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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24 Apr 2020 06:52 #824129 by TexasKZ
Replied by TexasKZ on topic Silencer exhaust muffler inside photo kz440 81
Kawasaki certainly came up with an elegant way to break up a wide spectrum of frequencies.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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19 Jun 2020 19:21 - 19 Jun 2020 21:46 #828499 by SpecialGreen
Replied by SpecialGreen on topic Silencer exhaust muffler inside photo kz440 81
I'm trying to understand that original photo... that's what came out of the muffler? Which end is the exhaust?(!).
Last edit: 19 Jun 2020 21:46 by SpecialGreen.

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20 Jun 2020 11:20 #828525 by gd4now
Replied by gd4now on topic Silencer exhaust muffler inside photo kz440 81
Here is what the inside of a (K)Z650 muffler looks like.
1977 KZ650 B1
Pods and Denco header

OLD KAW OWNERS SMILE ALOT
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20 Jun 2020 11:55 #828529 by SpecialGreen
Replied by SpecialGreen on topic Silencer exhaust muffler inside photo kz440 81
Wow, what a complex design. You could probably pack around baffle tube (#4).

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21 Jun 2020 10:25 - 21 Jun 2020 10:28 #828585 by F64
Replied by F64 on topic Silencer exhaust muffler inside photo kz440 81
The other photos from that day.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
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Last edit: 21 Jun 2020 10:28 by F64.

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21 Jun 2020 11:02 #828591 by SWest
Replied by SWest on topic Silencer exhaust muffler inside photo kz440 81
A good welder can fix that. It's not meant for packing.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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22 Jun 2020 11:00 #828673 by F64
Replied by F64 on topic Silencer exhaust muffler inside photo kz440 81
I wanted to run a straight through pipe.
I bought an exhaust baffle online and packed it to fit inside the stock megaphone.
The destruction was due to my curiosity and lack of 110v ac.
The sound is better and lambda is in range so no need to go back to stock.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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23 Jun 2020 09:00 #828730 by gavroyer
Replied by gavroyer on topic Silencer exhaust muffler inside photo kz440 81
Would be curious what that sounds like now, and also which baffle you bought.
1980 KZ440-A1 LTD

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23 Jun 2020 10:49 #828746 by F64
Replied by F64 on topic Silencer exhaust muffler inside photo kz440 81
No eBay APP ID and/or Cert ID defined in Kunena configurationOne day I may record the sound. I don't have my calibrated microphone on me right now and my phone microphone is definitely not accurate.
The baffle was an ebay purchase as I'm trying not to go too crazy with spending money.



I wrapped packing around them and pushed them as far into the muffler housing as possible.
I tried to match the pipe size coming into the muffler to prevent a drastic slowdown in exhaust speed.
I did run the bike with just the empty megaphone for a bit but the resonance at 6k was too much and it was just loud at the wrong frequencies.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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