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Hooliken
Posted on Saturday, November 24, 2007 - 09:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Have had my Spec Ops on for a while now and enjoy the increased performance and the sound. Only have one question for others that also have this pipe. Does yours pop when slowing down, in gear coming off the throttle? I thought I may have an exhaust leak but that is not the case. Just wondering if anyone elses does this?
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Adrian_8
Posted on Saturday, November 24, 2007 - 11:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I had a "tailgunner" for awhile...too loud for me... the pop is probably just the lean condition of the FI...something EPA has crammed down our carburetors...
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Aeholton
Posted on Saturday, November 24, 2007 - 04:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yeah, I had a tailgunner too. It used to pop on deceleration. Replaced it when I bought the Buell race kit. I think the tailgunner would be better made without valve and run it with a race ecm.
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Slowride
Posted on Sunday, November 25, 2007 - 01:53 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hooliken,
Yes, mine pops if I use the engine to brake like you're suggesting. If I just clutch it and let the motor wind down it doesn't pop.

It is classic harley sportster scavaging. All 3 of my sportys did it with various pipes.
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Hooliken
Posted on Monday, November 26, 2007 - 05:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thank you folks.....with earplugs in I hardly notice it. Just making sure I did not botch something when I put it on. Definitely turns heads now instead of sounding like a sewing machine doing the polka.
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Terrible1one3
Posted on Monday, November 26, 2007 - 02:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I hear there are two ways to get rid of it, both require a custom map or tune. Either remove almost all the fuel on throttle roll off or dump a bunch of fuel on throttle roll off, the inbetween is what causes the pop. On harleys it is very common, unless the bike has been tuned by a good tech, where he applies one of these two methods and removes decel pop.

This might be wrong but it was how it was described to me in lehmans terms from a tech.
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