Muffler Maintenance?

jonthechron · February 17th, 2010, 09:39 PM

I just found out all all(most) aftermarket exhaust mufflers require periodic maintenance, any of you guys drilled out the rivets to change the blanket and steel wool? Do you actually notice a drop in HP/Power over time?

2WheelGuy · February 17th, 2010, 11:03 PM

The packing is there to make the muffler quiet. When the packing goes the pipe gets much louder. Aftermarket exhausts usually get trashed long before the muffler needs repacking. Some mufflers use screws, others use pop-rivets to hold the core in. It's not hard to remove the core but drilling out pop-rivets can be a pain.

You can buy generic muffler packing from most cycle accessory stores. Quality exhaust manufacturers such as Muzzy will sell a repack kit that includes pre-cut packing (sometimes with a new core) and new pop-rivets if needed. Most will also offer a re-packing service where you mail your muffler to them to be repacked.

jonthechron · February 18th, 2010, 10:20 PM

Thanks a lot for this info, very informative. Stashed that in the back of my head, might come in handy one day.

February 17th, 2010, 09:39 PM	#1
jonthechron ninjette.org sage Name: Jon Location: Usa Join Date: Jan 2010 Motorcycle(s): magHitVE Posts: 649	Muffler Maintenance? I just found out all all(most) aftermarket exhaust mufflers require periodic maintenance, any of you guys drilled out the rivets to change the blanket and steel wool? Do you actually notice a drop in HP/Power over time?

February 17th, 2010, 11:03 PM	#2
2WheelGuy ninjette.org certified postwhore Name: Craig Location: Silicon Valley, CA USA Join Date: May 2009 Motorcycle(s): '98 EX250, '02 EX250, '08 250r, '03 SV650, '98 GSXR750 '03 Hayabusa, '87 YSR50, '84 ZX900, +MORE Posts: A lot.	The packing is there to make the muffler quiet. When the packing goes the pipe gets much louder. Aftermarket exhausts usually get trashed long before the muffler needs repacking. Some mufflers use screws, others use pop-rivets to hold the core in. It's not hard to remove the core but drilling out pop-rivets can be a pain. You can buy generic muffler packing from most cycle accessory stores. Quality exhaust manufacturers such as Muzzy will sell a repack kit that includes pre-cut packing (sometimes with a new core) and new pop-rivets if needed. Most will also offer a re-packing service where you mail your muffler to them to be repacked. __________________________________________________ CraigHarris.org Pacific Track Time CraigsWeb See you at 2014 MotoGP Laguna Seca! We'll be camping on Fox Hill. AFM #278

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February 18th, 2010, 10:20 PM	#3
jonthechron ninjette.org sage Name: Jon Location: Usa Join Date: Jan 2010 Motorcycle(s): magHitVE Posts: 649	Thanks a lot for this info, very informative. Stashed that in the back of my head, might come in handy one day.