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Muffler Repacking

jmhines2010-08-11 07:14:32 +0000 #1
Question for the guys running mufflers with fiberglass packing, which I guess would be everybody but those running the HMF swamp series.

I'm researching trying to decide which exhaust to go with and I read on the Big Gun website that they recomend repacking their mufflers every 15 hours of use...I would think that riding in mud and water would shorten that bit it may be based more on guys racing with them or two strokes that may wear the packing out quicker, or some other combination of factors.

I know it's not hard to do or real expensive...but, for me, 15 hours would mean packing it every 3 weeks or so during riding season, but I don't hear a lot of guys talking about idoing it so I'm thinking most probably go way past that.

So the question is how often are you repacking your mufflers? Maybe a better question is how long does it take for the packing to start sounding "worn out" weather or not you go ahead and change it.
jrpro1302010-08-11 07:18:43 +0000 #2
I haven't repacked my muzzy in the 9 months i have had it. Sounds pretty much the same to me. I ride 90 percent water, gets wet all the time
AMR8402010-08-11 07:48:35 +0000 #3
I personally would go muzzy pro because of irresputable evidence it makes about 5 hp more than the rest. I only repacked once in 3000 miles and it did not need it.
GWNBrute2010-08-11 07:34:12 +0000 #4
I have a big gun and I repacked mine after 40hrs and it did not need it.
JHR2010-08-11 08:05:52 +0000 #5
do u have to drill out the rivets to repack a HMF?
Polaris4252010-08-11 09:36:26 +0000 #6
It's a pain and aggrivating to do... I've repacked my LRD several times and once it get's wet it doesnt last long... Anyone looking into buying a new exhaust that does a lot of mud/water riding I would suggest the swamp series w/ metal baffles... If I was buying another I would have one for sure.
jmhines2010-08-11 08:18:31 +0000 #7
I asked cause Iv'e noticed when I look around at the riding parks that the same brand exhaust sounds way different on different bikes. I wonder if the packing worn out to different extents causes that.

Thanks for the input guys.
camo6502010-08-11 10:21:18 +0000 #8
I didn't repack my HMF till there wasn't any packing left in it. Of course I didn't have a core left ethier because of this. So when I had to redo mine, I had to make a new core and then I repacked it with carbon fiber. It sounds kind of like a sport bike now, untill it warms up. Then it just sounds like an HFM again. My original packing lasted about 1000 miles of mud and water ridding till it was all gone.
filthyredneck08brute2010-08-11 09:35:02 +0000 #9
Have the Muzzy on mine....a little over 240 hours on the clock and havnt repacked it yet...gets wet/muddy and still sounds the same.



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