Repacking Exhaust Systems...

PrePharm · 03-08-2010, 12:34 PM

Can someone explain why motorcycle's after market exhaust system require repacking and not for a automobile?

Do anything happen as miles accumulate on an aftermarket exhaust system?

2000gsr · 03-08-2010, 12:51 PM

Exhaust systems get louder over time as the packing degrades through heat cycles but most people usually sell the bike or car before that happens. Repacking seems overkill in my opinion and cost/hassle is not worth it. Both car and bike exhausts can be repacked and you DON'T have to repack your motorcycle exhaust, nothing will happen.

PrePharm · 03-08-2010, 03:07 PM

Got it. Thanks!

Subw00er · 03-08-2010, 04:18 PM

I think bike packing is generally a fiberglass cloth type packing which does not last as long as metal fiber or mesh packing. I'd guess they primarily do this on bikes to save weight.

maaicher · 03-08-2010, 09:12 PM

Quote:

Originally Posted by 2000gsr

Exhaust systems get louder over time as the packing degrades through heat cycles but most people usually sell the bike or car before that happens. Repacking seems overkill in my opinion and cost/hassle is not worth it. Both car and bike exhausts can be repacked and you DON'T have to repack your motorcycle exhaust, nothing will happen.

Not entirely true, not packing the exhaust on a bike properly will downgrade performance. Dyno's have shown that a bike with worn out packing loses HP vs a bike that has replaced packing at the recommended times. The bikes are jetted to run with the packing and need it to run properly, this is why when you go to the dessert and hear someone that has removed the muffler on the bike you can tell that the bike is running horribly. Repacking the exhaust on a motorcycle is also cheap and worth the hassle. As far as cars go the packing itself lasts much longer and isnt something that should ever have to be worried about

JCtx · 03-09-2010, 11:42 AM

Stainless steel 'wool' never needs repacking, but it's more expensive.

PrePharm · 03-10-2010, 06:52 PM

Got it. Thank you guys!

03-08-2010, 12:34 PM	#1
PrePharm Second Lieutenant 25 Rep 244 Posts Drives: '09 White M3 Coupe M-DCT Join Date: Aug 2009 Location: Clovis, Ca iTrader: (1)	Repacking Exhaust Systems... Can someone explain why motorcycle's after market exhaust system require repacking and not for a automobile? Do anything happen as miles accumulate on an aftermarket exhaust system?
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03-08-2010, 12:51 PM	#2
2000gsr First Lieutenant 18 Rep 396 Posts Drives: 2018 M4 Join Date: Aug 2008 Location: Toronto, ON iTrader: (0)	Exhaust systems get louder over time as the packing degrades through heat cycles but most people usually sell the bike or car before that happens. Repacking seems overkill in my opinion and cost/hassle is not worth it. Both car and bike exhausts can be repacked and you DON'T have to repack your motorcycle exhaust, nothing will happen. Last edited by 2000gsr; 03-08-2010 at 12:58 PM..
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03-08-2010, 03:07 PM	#3
PrePharm Second Lieutenant 25 Rep 244 Posts Drives: '09 White M3 Coupe M-DCT Join Date: Aug 2009 Location: Clovis, Ca iTrader: (1)	Got it. Thanks!
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03-08-2010, 04:18 PM	#4
Subw00er Bates '08 Interlagos Launch 126 Rep 1,230 Posts Drives: 440i xGC, ZL1, JCW Join Date: Nov 2005 Location: NY iTrader: (2)	I think bike packing is generally a fiberglass cloth type packing which does not last as long as metal fiber or mesh packing. I'd guess they primarily do this on bikes to save weight. __________________ Custom Exhaust Project: Bates Valvetronic exhaust: http://www.m3post.com/forums/showthread.php?t=253661 -- Exhaust Mod pics in here: http://www.flickr.com/photos/40236795@N03/ DON'T BUY Race Ready Performance electronic cutout valves. Here's why: http://www.m3post.com/forums/showthr...40#post9589740
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03-09-2010, 11:42 AM	#6
JCtx Major General 258 Rep 5,012 Posts Drives: No BMW yet Join Date: May 2008 Location: El Paso TX iTrader: (0)	Stainless steel 'wool' never needs repacking, but it's more expensive.
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03-10-2010, 06:52 PM	#7
PrePharm Second Lieutenant 25 Rep 244 Posts Drives: '09 White M3 Coupe M-DCT Join Date: Aug 2009 Location: Clovis, Ca iTrader: (1)	Got it. Thank you guys!
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