Decel popping

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Oct 22, 2009 | 06:06 PM

trackadaptor

Thread Starter

Road Warrior

Joined: Apr 2007

Posts: 1,406

Likes: 5

From: Sunnyvale, Ca.

Decel popping

Ok... so with the Ca. Cat in the Header Pipe no Decel popping

With 49 state no cat. in the head pipe I get some downhill decel popping..

Any where I should start looking for trouble or just normal..

I have Slip on's Reinharts , Stage 1 Harley down load and air SE Air Cleaner kit

Oct 22, 2009 | 06:17 PM

jbnl163

Outstanding HDF Member

Joined: Nov 2006

Posts: 2,115

Likes: 1

From: CA

My guess is less back pressure.

Oct 22, 2009 | 06:19 PM

DocHarley

Stellar HDF Member

Joined: May 2007

Posts: 2,911

Likes: 2

From: South Fla.

Quote:

Originally Posted by trackadaptor

I drive with a lot of Hogs and I can't remember hearing one that "DID NOT" back fire upon deceleration to some degree. Easy test would be remove your spark plugs and check for the color to see how your engine is running. Click here ------> http://www.totalmotorcycle.com/maint...sparkplugs.htm

Oct 22, 2009 | 06:31 PM

kingkingking

Road Warrior

Joined: Dec 2008

Posts: 1,639

Likes: 2

From: Australia

Decel popping is carbon monoxide (CO) in the exhaust burning when it hits the air. if you have cat converter/s the CO is oxidised (burnt) in the cat and therefore doesnt pop.

Oct 22, 2009 | 06:34 PM

prodrag1320

Banned

Joined: Sep 2009

Posts: 3,569

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From: deland,florida

too fat on the small end,ex. temp is over the igniting temp of gas,every cam has a little reversion,(dumping raw fuel into the pipes,use a powercommerder,or what ever to bring the ex temp. down on the first couple set of cells,lean out.(get temp to about 850,fuel ingnites at 1150)