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Mechanical and Technical Mechanical and technical topics, help, and discussions

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Apr 29th 2016, 11:09 AM   #1
 albatrosscafe's Avatar
 
  Jan 2016
  Issaquah

  2015 Yamaha FZ-07
Question How often do you repack your muffler?

For those with aftermarket exhausts, what kind of bike & exhaust do you have and how often do you repack your muffler (if at all...?)


Does it really affect performance if you let it go too long without a repacking?
Apr 29th 2016, 11:31 AM   #2
 GPD323's Avatar
 
  Jan 2016
  Spanaway

I repacked my FMF on my KLR last year. The packing I took out was blasted through in spots and burned in many places. It was LOUD!

I used this product and its now quite a bit quieter (its still the power bomb exhaust and large pipe and FMF Q2) but its definitely a more muted sound.

Because of the materials used this time I suspect I will never have to repack the FMF again.

The FMF has allen hex bolts so taking it apart was easy.

My Akros on the other hand need a rivet and strap kit besides the packing material.

As for frequency? I cannot answer that Q.

Muffler Packing

This is what the OEM packing looked like.

replacement materials.


starting the repacking.
Apr 29th 2016, 12:56 PM   #3
 albatrosscafe's Avatar
 
  Jan 2016
  Issaquah

  2015 Yamaha FZ-07
Hmm... maybe the frequency is just when it "becomes too loud" or you otherwise notice that "muffling" is not happening? I wish I knew if that was on the order of 10k miles, 5k miles, 50k miles, or whatever.

cool pics though!
Apr 29th 2016, 01:16 PM   #4
 Arnbo's Avatar
 
  Jan 2016
  Ferndale Washington

  ZX10-R GSXR 600 Track Bike
The M4 on my Zx10 Is blown out I just ordered a Werkes.
Apr 29th 2016, 02:23 PM   #5
 MrPersonality's Avatar
 
  Feb 2016
  Kent (Cheese-Hill)

  Yamaha FZ-09
I repacked a Yoshi can a few years ago. It required drilling out rivets, beating the dog-snot out of the can to separate it, re-packing it, pounding the crap out of it the get it back together, and then re-riveting it.

It was a grade-A PITA...so much so that I swore if I ever need to do it again, I would just pay to send it back to the manufacturer and have them do it (and I am a bit of a tight-wad)

As for frequency of repacking - I think most manufacturers have guidelines on their web sites. From what I have seen 10 to 15k miles seems to be the suggested norm.

If you do decide to do it on your own...good luck...and may God have mercy on your soul.
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Apr 29th 2016, 03:46 PM   #6
 albatrosscafe's Avatar
 
  Jan 2016
  Issaquah

  2015 Yamaha FZ-07
Quote:
Originally Posted by MrPersonality
I repacked a Yoshi can a few years ago. It required drilling out rivets, beating the dog-snot out of the can to separate it, re-packing it, pounding the crap out of it the get it back together, and then re-riveting it.

It was a grade-A PITA...so much so that I swore if I ever need to do it again, I would just pay to send it back to the manufacturer and have them do it (and I am a bit of a tight-wad)

As for frequency of repacking - I think most manufacturers have guidelines on their web sites. From what I have seen 10 to 15k miles seems to be the suggested norm.

If you do decide to do it on your own...good luck...and may God have mercy on your soul.
lol I have an Akra Carbon and I would be afraid to even touch it. I feel I would crack that carbon fiber with any kind of "de-riveting" work that I would try to do.

Do you know what it would have cost you to send it to the dealer? I would probably do the same.
Apr 29th 2016, 03:52 PM   #7
 GPD323's Avatar
 
  Jan 2016
  Spanaway

If repacking was 10-15k miles then I would be doing it 2 or 3 times a year!

The Akrapovic rebuild kit is $100 each can and its fluff internals guaranteed to blow out again.

I just installed the silencers and am GTG.
Apr 29th 2016, 03:58 PM   #8
 albatrosscafe's Avatar
 
  Jan 2016
  Issaquah

  2015 Yamaha FZ-07
Red face

Quote:
Originally Posted by GPD323
If repacking was 10-15k miles then I would be doing it 2 or 3 times a year!

The Akrapovic rebuild kit is $100 each can and its fluff internals guaranteed to blow out again.

I just installed the silencers and am GTG.
I was gonna say... I've put on 7k miles in the last 5 months... I hope it is not that short. $100 is a lot more than I was expecting. I guess I'll worry about it when my exhaust starts sounding like it is gonna explode
Apr 29th 2016, 08:08 PM   #9
 Pigs's Avatar
 
  Jan 2016
  Portland

  bicicleta
two brothers on mine. Uses bolts intend of rivets. If I had to guess, it has about ~15,000 miles on it and can't see myself repacking it anytime soon.

Is having the packing removed/burned through the same as having no muffler at all?
Apr 29th 2016, 11:09 PM   #10
 Parilla125's Avatar
 
  Jan 2016
  SeaTac

Depends on the restriction and how much exhaust is actually being forced through the packing. I had a bike I ran the snot out of and it was LOUD. Finally decided to repack it and it looked brand new. I mean actually still white! Some pipes are just loud and free flowing. Without much restriction. You will be pissed if you pull it apart and it looks new...
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Apr 30th 2016, 06:49 AM   #11
 Arnbo's Avatar
 
  Jan 2016
  Ferndale Washington

  ZX10-R GSXR 600 Track Bike
I decided that the M4 is just too damn loud it has gotten me pulled over twice
both times in Island County just outside Oak Harbor.No ticket or Fashion award. Just
how they heard me coming.Politeness and being respectful always with officers of the law a little kindness does indeed go along way.
Apr 30th 2016, 12:21 PM   #12
 curve addict's Avatar
 
  Apr 2016
  Des Moines, WA

  ...1987 Yamaha FZR1000...
I repack when I rev the engine and pretty sparkly thingies fly from the tip and dance in the sunlight.

(Damn, that was some good acid.)
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Apr 30th 2016, 12:29 PM   #13
 Squidly's Avatar
 
  Jan 2016
  Bothell

I repacked my TwoBros around 10k miles, but I also chopped the can in half so it ended up way louder.

Fwiw the old packing looked a bit lean but didn't have any holes.
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