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Back pressure.

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Old Feb 17, 2026 | 10:48 PM
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Default Back pressure.
I have a 2004 road king and just newly installed some straight pipe fishtails. Love the sound but the bike doesn’t like em. Under low idle 10-30 mph. It spits and sputters. The straight pipes don’t have enough back pressure. My question is What is the cheapest and easiest way to fix this? Not sure if a $500 tuner will fix this issue. Any ideas. Thank you.
 
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Old Feb 18, 2026 | 03:27 AM
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CK Customs lollypops.
 
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Old Feb 18, 2026 | 04:42 AM
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Couple questions.

One would assume you Roadking is a FI model since your considering a tuner?

Explain low idle at 30mph?
 
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Old Feb 18, 2026 | 06:58 AM
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Originally Posted by Randystreetglide
I have a 2004 road king and just newly installed some straight pipe fishtails. Love the sound but the bike doesn’t like em. Under low idle 10-30 mph. It spits and sputters. The straight pipes don’t have enough back pressure. My question is What is the cheapest and easiest way to fix this? Not sure if a $500 tuner will fix this issue. Any ideas. Thank you.
You never want back pressure, or restriction.. that’s a misguided myth. You want to brake up reversion. The bolt trick AKA TTI’s, AKA Lollipops do a pretty good job of restoring most of that dip. Opening up the tails helps too.
 
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Old Feb 18, 2026 | 07:28 AM
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Originally Posted by Rains2much
You never want back pressure, or restriction.. that’s a misguided myth. You want to brake up reversion. The bolt trick AKA TTI’s, AKA Lollipops do a pretty good job of restoring most of that dip. Opening up the tails helps too.
Bolt trick ? I’ve welded a small washer inside of other pipes and seemed to work as well, but what is TTi’s or lollipops ?
 
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Old Feb 18, 2026 | 07:29 AM
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Originally Posted by Slingshot383
CK Customs lollypops.
what is CK customs lollipops ?
 
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Old Feb 18, 2026 | 07:36 AM
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Originally Posted by Randystreetglide
what is CK customs lollipops ?

Essentially a washer on a bolt
 
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Old Feb 18, 2026 | 08:01 AM
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Some folks have reported good results with these:

Choosing the Right Size Thunder Torque Inserts
 
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Old Feb 18, 2026 | 08:12 AM
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It's DK Customs, not CK. Eye bolt, lollipop, TTI. All basically the same.

John
 
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Old Feb 18, 2026 | 08:21 AM
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I have been doing this for over 30 years.




 
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