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Kerker 4 into 1 Exhaust Packing

  • Thread starter Thread starter Matt420740
  • Start date Start date
M

Matt420740

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Hey guys. In early 2018 I found a vintage Kerker 4 into 1 on craigslist for sale. Went and picked it up and threw it on my 82-750T. After the first few rides I noticed a light brown fuzzy material sticking around the exhaust cone. The 30+ year old exhaust packing was disintegrating and slowly blowing out. The more I rode the more blew out, and over the course of last season the bike slowly changed from sounding wonderful, to straight up ear-rape at anything above 6K RPM. So I need to pull the cone and baffle and re-pack. What type of packing would you guys recommend for the Kerker? Fiberglass, Ceramic, Wire Wool?


 
I use fibreglass packing for my kerker...you can buy it at your local motorcycle dealer. So easy to do that even I did it. :)
 
I've tried fibreglass (didn't last long), rockwool (didn't last long), wire wool (disintegrated and blew out in fiery lumps), genuine exhaust packing (expensive and didn't last long), stainless steel pan scrubbers (lasted for ages and didn't fall apart or blow out in fiery lumps), and a baffle washer which by a process of trial and error worked well and is almost indestructible.
 
The baffle in my muffler (of unknown origin) works a bit differently than yours. Your baffle likely has a straight-through core, with perforations. The perforations allow some of the sound to get to the outer part, which I call "the echo chamber". Packing that chamber with various materials will control the echo. As you have seen in the first few responses, different materials have different results.

My baffle is somewhat similar, but has a plug in the center, which forces all the exhaust to flow through the perforations, into the "echo chamber", past the plug, then back through the rear perforations and out the exit. Because exhaust has to actually flow through the packing material, I use very coarse stainless steel wool. Before I realized how that baffle worked, I had wrapped it with a fiberglass blanket, the bike almost didn't run, let alone well. :oops:

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If it's to loud, you're to old... ��... as I'm listening to Frank Zappa's Joe's Garage.
The white zone is for loading and unloading only... any catholic girls out there. Lol
 
Last edited:
storm 64 said:
If it's to loud, you're to old... ��... as I'm listening to Frank Zappa's Joe's Garage.
The white zone is for loading and unloading only... any catholic girls out there. Lol
Click to expand...

I've got one for a cousin... I love how they go, so send me a dozen!

Awesome (triple) album
 
Thanks for the advice guys. Went with FMF fiberglass packing because thats the only thing I could find locally. Got it from the Honda Dealership, and it was only $9. Thats even cheaper than it sells for on Amazon lol.



IMG_20190427_165836.jpg
 
When I bought my 11E almost six years ago, PO told me the V&H 'Street Megaphone' needed repacking. I disagreed. It weren't broke, I aren't fixing it.

I have purchased a V&H 'SS' canister system which I plan to install. I'm so old, the megaphone system looks a little short and stunted. In my day, 4-into-1s were longer (and made the rear wheel harder to remove).

And before the crowd piles on, I'm very courteous to my neighbors (I have a lot of experience - for a few years in the '80's I rode my KAW900 with a completely open pipe. I pushed it down the block before starting it, then idled away. On the way home, I coasted down the block with the engine off.)

Now the people a half mile down the block, they may have a completely different opinion. Setting off car alarms seemed harmless to a twenty-something. Good clean fun.
 
Rob S. said:
And before the crowd piles on, I'm very courteous to my neighbors ...
Click to expand...
I don't worry about being courteous to my neighbors. :-k

The one closest to me has a Goldwing that is louder than mine. And it's stock. :encouragement:

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