Sportster Models 883, 883 Custom, 1200 Custom, 883L, 1200L, 1200S, 1200 Roadster, XR1200, and the Nightster.
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Another "Backfire" post

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Old Apr 4, 2013 | 03:35 PM
  #1  
Bar Nuthin's Avatar
Bar Nuthin
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From: Indiana
Default Another "Backfire" post

Searched but couldn't find a similar thread.

1998 1200C with SE exhaust and Arlen Ness stage 1.

#44 pilot jet and stock 170 main jet with a C65 needle shimmed .40. idle mix just past 2.5 turns out. averaging about 38 mpg best I can tell.

Bike starts easy (cold or hot), idles great, accelerates great. Plugs have a nice "paper bag" brown color.

My only concern is about 50% of time when I restart the bike, I get a loud "gunshot" backfire out of the exhaust - and it fires right up. Kind of funny to watch people jump, but I'm curious if this is a sign that something isn't quite right on the bike.
 
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Old Apr 5, 2013 | 03:03 AM
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Check your engines Timing.
 
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Old Apr 5, 2013 | 06:27 AM
  #3  
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Originally Posted by Dual-Linkerts
Check your engines Timing.
ah, time to break out the service manual
 
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