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Exhaust repack help!

  1. #1
    Lifer SwiftTone's Avatar
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    Exhaust repack help!

    I am trying to repack my Akrapovic/BMW slip-on can thats on my XR.

    The rivets are located only on the exit side of the can. The inlet side is completely sealed. I removed the rivets, ran a pick between where the metals meet to clean it up, but I'm having trouble pulling it apart. There is also nothing to really grab onto to pull it apart. I am able to wiggle the center piece a little but not able to pull it away from the sleeve.

    Are these meant to come apart to be repacked? How do it take it apart?!


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    Four wheels move the body, two wheels move the soul.

    Current: 2016 S1000XR. Past: S1000R, Streefighter S, Monter S2R1000, RC51, CBR600

  2. #2
    Lifer
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    Re: Exhaust repack help!

    I have repacked an older Yosh pipe a couple times. Getting those caps off can be a real bear. When you assemble you should be sealing it. That sealant acts as an adhesive too. I, unfortunately, haven't figured out a way to easily separate the ends except with some pretty brutal force; screwdrivers, prying, etc. I wonder if applying some heat might help too. Much more difficult on a street bike where you care about looks. My Yosh experience is with a shitbox SV race/track bike.

    Good luck. Wear gloves. The packing is usually carboned up pretty bad.

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  3. #3
    Soul Rider Paul_E_D's Avatar
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    Re: Exhaust repack help!

    Definitely HEAT.

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  4. #4
    Lifer SwiftTone's Avatar
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    Re: Exhaust repack help!

    Quote Originally Posted by nhbubba View Post
    I have repacked an older Yosh pipe a couple times. Getting those caps off can be a real bear. When you assemble you should be sealing it. That sealant acts as an adhesive too. I, unfortunately, haven't figured out a way to easily separate the ends except with some pretty brutal force; screwdrivers, prying, etc. I wonder if applying some heat might help too. Much more difficult on a street bike where you care about looks. My Yosh experience is with a shitbox SV race/track bike.

    Good luck. Wear gloves. The packing is usually carboned up pretty bad.
    Quote Originally Posted by Paul_E_D View Post
    Definitely HEAT.
    Have you guys taken apart an exhaust where it only opens on one side?

    Where do I apply the heat?

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    Four wheels move the body, two wheels move the soul.

    Current: 2016 S1000XR. Past: S1000R, Streefighter S, Monter S2R1000, RC51, CBR600

  5. #5
    Lifer jimmycapp's Avatar
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    Re: Exhaust repack help!

    I've used a rubber mallet to knock it back and forth to get it moving.

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  6. #6
    Lifer OneCheekRider's Avatar
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    Re: Exhaust repack help!

    Am I supposed to repack my slip-on?? I haven't touched the LeoVince that's been on my Tiger for over 50k miles now

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  7. #7
    Lifer jimmycapp's Avatar
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    Re: Exhaust repack help!

    I did my r1 at about 44000 miles.

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  8. #8
    Lifer
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    Re: Exhaust repack help!

    Quote Originally Posted by SwiftTone View Post
    Have you guys taken apart an exhaust where it only opens on one side?

    Where do I apply the heat?
    I wound up removing both ends. It sort of turned into a clusterfuck. But then I have an older yosh pipe that had been down and had some "patina" to it. A clean street bike should be different.
    Apply heat around where the end-cap is riveted to the can itself.

    Quote Originally Posted by OneCheekRider View Post
    Am I supposed to repack my slip-on?? I haven't touched the LeoVince that's been on my Tiger for over 50k miles now
    Well. It will only get louder as the packing gets burned out!
    In my case I repacked a really knackered used can once while racing. I then repacked it again years later for a track day at Palmer as I was convinced the bike was not going to pass their sound checks. That time the packing was in really good shape and arguably did not need to be repacked. I could not tell the difference after the repack. Although I was not flagged at Palmer.. so?!?

    I also repacked my 2-stroke dirt bike with who knows how many hours on it. The packing in that silencer was so good I just put it back and held onto the packing kit for another day. I have no idea how to gauge when it needs to be done or not.

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  9. #9
    Lifer OneCheekRider's Avatar
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    Re: Exhaust repack help!

    Quote Originally Posted by nhbubba View Post
    Well. It will only get louder as the packing gets burned out!
    In my case I repacked a really knackered used can once while racing. I then repacked it again years later for a track day at Palmer as I was convinced the bike was not going to pass their sound checks. That time the packing was in really good shape and arguably did not need to be repacked. I could not tell the difference after the repack. Although I was not flagged at Palmer.. so?!?

    I also repacked my 2-stroke dirt bike with who knows how many hours on it. The packing in that silencer was so good I just put it back and held onto the packing kit for another day. I have no idea how to gauge when it needs to be done or not.
    Louder means faster, right? I'm positive that's the mentality by some car/bike people that speed by my house. Anywho, I guess I'll just leave it as is -- I haven't noticed an increase in noise (I'm sure it's subtle over a long period of time) but if that's the only side effect, I don't see the need to tear into it just yet

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  10. #10
    Soul Rider Paul_E_D's Avatar
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    Re: Exhaust repack help!

    Quote Originally Posted by OneCheekRider View Post
    Louder means faster, right? I'm positive that's the mentality by some car/bike people that speed by my house. Anywho, I guess I'll just leave it as is -- I haven't noticed an increase in noise (I'm sure it's subtle over a long period of time) but if that's the only side effect, I don't see the need to tear into it just yet
    Agreed, if it's not obnoxious, don't bother.

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  11. #11
    Posting Freak jeantarrou's Avatar
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    Re: Exhaust repack help!

    Another reason to repack an exhaust is in the event the original packing degrades significantly and causes discoloration on the metal sleeve or starts to burn a carbon sleeve. I had this happen on a Termi carbon exhaust on my hyper, luckily for me both ends of the sleeve had riveted endcaps and was a relatively easy job. My only suggest to the OP would be to maybe use a coat hanger to fish out the old packing material?

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