Decel Pop, just one, but its loud, Lean or rich??

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Jul 6, 2017 | 05:03 PM

slvrscoobie

Thread Starter

Road Master

Joined: Apr 2016

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From: NJ

Decel Pop, just one, but its loud, Lean or rich??

Hi Guys,
Im getting basically one loud pop if I crank on it up to 5-6K then let off, it decels nicely then around 3-4K I get loud Pop, almost like a backfire. almost sounds like it builds up then lets go. doesnt do it basically unless I do exactly that thing. I know, just dont do that thing right?
Im wondering if that means its likely too rich or too lean on my decel? Figured I could do a 5/10%+ and 5/10% minus and see but that seems like a lot of work, maybe you all already know.
1200r with AC / slip ons.
AFR 20Kpa set to 13.2 from 1750-5000.
Enleanment set to 0.5
Closed Throttle Spark set to 40 @ 320 degrees and 4Krpm

Jul 8, 2017 | 11:25 AM

hrdtail78

Road Warrior

Joined: Mar 2013

Posts: 1,923

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From: Alorton, Illinois

Usually one solid pop is from rich.

Jul 8, 2017 | 11:43 AM

slvrscoobie

Thread Starter

Road Master

Joined: Apr 2016

Posts: 1,031

Likes: 141

From: NJ

Quote:

Originally Posted by hrdtail78

Usually one solid pop is from rich.

thanks, I'll lean it out on the 20kpa.
Would it maybe too rich up at 80-100% throttle that causes it too?

Jul 8, 2017 | 05:55 PM

nevil

Seasoned HDF Member

Joined: Jul 2008

Posts: 9,281

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From: southeast PA

Before you make any tuning changes check for intake and exhaust leaks. If you have any mechanical issues there's no tuning that will fix that.

Jul 9, 2017 | 01:08 AM

OldEnuf2NoBtr

Seasoned HDF Member

Joined: Dec 2009

Posts: 9,162

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From: Doghouse... mostly

If your consistently taking the motor up to 5-6K , Please give me the VIN so I never have to deal with it after you decide to sell it!

Jul 9, 2017 | 07:59 AM

slvrscoobie

Thread Starter

Road Master

Joined: Apr 2016

Posts: 1,031

Likes: 141

From: NJ

Quote:

Originally Posted by OldEnuf2NoBtr

If your consistently taking the motor up to 5-6K , Please give me the VIN so I never have to deal with it after you decide to sell it!

only buying lugged motors are we? Better put Cvaria on that list too. where did i say i did it consistently? better not say I go to 7K occasionally too.