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Harley muffler with old back fire (Read 92 times)

Serious Thumper

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Harley muffler with old back fire
06/16/15 at 18:56:03

Gents:

The s40 is running well; although, something new is occurring. I put on a dyna muff about 2 years ago and as opposed to the back fire I would get a deep gargle. For about a month now it is gradually getting louder & louder I am getting the old back fire again. It doesn't really bother me, just curious why? Perhaps a loose ground wire? Thanks.

Best regards,

I don't make the rules, I just know what they are.....

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old_rider Serious Thumper Offline Backyard Bill Productions Posts: 3147 flordia panhandle Gender:	Re: Harley muffler with old back fire Reply #1 - 06/16/15 at 19:30:14 Internals are trying to get out.....burned up inside, mine is doing it also. Ever look at your bike from the back while its running down the road? you know....while riding a friends bike? The exhaust hole looks like another tail light, bright red!
Back to top	We are here to laugh at the odds and live our lives so well that Death will tremble to take us. IP Logged

Serowbot YaBB Moderator ModSquad Online OK.... so what's the speed of dark? Posts: 29277 Tucson Az Gender:	Re: Harley muffler with old back fire Reply #2 - 06/16/15 at 22:23:24 Could be rotting muffler guts as OR says,... could be loosened header bolts, or muffy clamp... Check for snug... but don't strip... 22k miles... my Sporty shorty shot it's baffle plate out like a bullet... Luckily,... I bought a pair... ...
Back to top	Ludicrous Speed !... ... ... IP Logged

pg Serious Thumper Offline Posts: 5274 In Transit	Re: Harley muffler with old back fire Reply #3 - 06/17/15 at 06:40:46 Thanks guys, it must be all that tremendous power that single piston puts out. Best regards,
Back to top	I don't make the rules, I just know what they are..... IP Logged

Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: Harley muffler with old back fire Reply #4 - 06/17/15 at 19:01:15 Considering how this thing vibrates, check your air screw on the carb. It may have vibrated loose.
Back to top	There's no problem that a full tank of gas and a sunny day can't fix! 2008 S40, Rotella T 15W-40 w/ZDDP added, Dyna, 140/90-15, Battery Tender Jr., Seat lift, #52.5/150/3 washers, Raptor IP Logged

Boogieman Senior Member Offline Bang! Bang! Posts: 284 NORCAL Gender:	Re: Harley muffler with old back fire Reply #5 - 06/18/15 at 12:00:23 Hollow it out and get a cone filter. it'll be near impossible to "tune" but she'll be obnoxiously loud and awesome
Back to top	'03 LS 650 bobber - Highly modified...crashed it. IP Logged

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