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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through October 07, 2009 » Hmf exhaust question « Previous Next »

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Thunderclap
Posted on Thursday, September 24, 2009 - 10:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

do u need to repack the hmf exhaust every once in a while like some of the other aftermarket exhuasts for the 1125r?
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Lovedabueller
Posted on Thursday, September 24, 2009 - 10:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

all exhaust packing will break down over time so the simple answer is YES>

(Message edited by lovedabueller on September 24, 2009)
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Thunderclap
Posted on Thursday, September 24, 2009 - 10:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

ok, i have no idea about this stuff so please forgive my stupidity on this subject.

Ive never heard of anyone saying i need to repack my stock exhaust after so many miles like some of the other exhaust, so any idea how many miles till you have to repack the hmf?
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T_man
Posted on Thursday, September 24, 2009 - 10:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

When it starts to sound 'tinny' and 'raspy'. Usually louder too. I wouldn't worry about it for a good 5000 miles at least.
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Xl1200r
Posted on Thursday, September 24, 2009 - 10:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Your stock exhaust has no packing.
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Lovedabueller
Posted on Thursday, September 24, 2009 - 11:03 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"After Market" Exhaust that are normally Riveted together after time the exhaust packing will get hot.and start to break down slowly. HMF, D&D, FMF, ARROW, all these and more all use repackable material in the muffler, Ther are not "chambered" exhaust. they are basically straight through screen type baffles that use packing around them to deflect and absorb sound.

hope this is understandable. it is to me.
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Thunderclap
Posted on Thursday, September 24, 2009 - 11:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

ok thank you. last question... now that i know they all need repacking, hmf or d&d?

is the hmf even nearly as loud or have as much rumble as the d&d?
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Lovedabueller
Posted on Thursday, September 24, 2009 - 11:22 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)



i do "think" that the hmf would be easier to repack than the D&D. thats just my opinion. and from what i have heard the D&D is really loud.

just my .02
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