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Cycle Shack Slip-ons backfires bigtime

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Old 08-12-2008, 03:33 AM
raztec raztec is offline
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Default Cycle Shack Slip-ons backfires bigtime

I just put a pair of Cycle Shack slip-ons on my '08 Nightster and the thing backfires bigtime on deceleration.

My dealer said that doing the remap download "might" help a little, but it wouldn't remove the backfiring completely.

Can anyone offer advice on what I can do to eliminate the backfiring on deceleration using these cycle shack slip-ons?

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Old 08-12-2008, 04:48 AM
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ayebyte ayebyte is offline
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thats normal..........seriously, you shouldn't have any problem with cycle shack. I have had them in the past. Mine were on a carburator model and re-jet was all it needed. As good or better than screamin' eagle.
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Old 08-12-2008, 05:01 AM
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Jarhead08 Jarhead08 is offline
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I have cycle shack drag pipes on my 08 1200 custom adn it pops and crackles too but it doesnt affect anything so I just deal with it.
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Old 08-12-2008, 03:04 PM
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Hummm, never had that problem with my cycle shacks. Didn't do any carb work at all when I put them on. Did the carb work after I added the Screamin Eagle Air Cleaner.

Could be the different engine size though.
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Old 08-12-2008, 03:54 PM
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creekhed1 creekhed1 is offline
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Add A/C, PCIII from FuelMoto and set closed throttle position...HELLO HORSEPOWER, Goodbye Backfires!!! (at least when it's warm
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Old 08-12-2008, 04:39 PM
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HDXXX HDXXX is offline
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I have an 06 carb and stage one. I like mine. Minimal backfire on decel. Try not to let off the throttle so hard.
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Old 08-12-2008, 10:34 PM
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SHOAT SHOAT is offline
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My Cycle Shacks also pop and rumble during deceleration. I like it! Reminds me of a 1971 Nova that I owned that had 12" Cherry Bombs on it!

2005 XL1200C
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Old 08-12-2008, 11:20 PM
jpar05nm jpar05nm is offline
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I've got cycle shack slip-ons,k&n a/c, re-jetted and Screaming Eagle 7000rpm ignition module. No backfiring or popping on decel on mine.
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Old 08-12-2008, 11:28 PM
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dmercer dmercer is offline
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Hell, my 1200C still has a stock powertrain (pipes coming via UPS thursday, VERY excited) and it pops a lot. I was worried about other issues in addition to the popping on decel, but the dealer went over the whole bike and told me to get back to riding the **** out of it because it's running fine. As long as you're not having detonation (which you'd probably know about one way or another) you're probably fine.
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Old 08-15-2008, 07:39 AM
mcouture mcouture is offline
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Did you put any hi temperature copper sealer (NAPA) where the slipons slide into the headers? I had to do that to stop the air leaking by and causing pops.

My Cycle Shacks rock. No pops ever.
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2007, backfire, backfires, cycle, davidson, deceleration, harley, nightster, ons, popping, problems, screaming, shack, slip, sporster, sportster

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