Down hill backfire

4 replies to this topic
  • 450high

Posted August 02, 2004 - 12:58 AM


My 450 always backfire when i let the throttle back to idle going down hills.Is there any easy fix.I believe it is worse with a clean are filter ?.Any ideas would be greatly appreciated.

  • the426master

Posted August 02, 2004 - 01:49 AM


it is idling to lean adjust your idle mixture screw on the bottom of your carb :thumbsup:

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  • Hank

Posted August 02, 2004 - 02:51 AM


Check out the Zip-Ty solution that replaces your origional screw with one that lets you adjust it with your fingers. They are sweeet.. :thumbsup:


Posted August 02, 2004 - 04:31 AM


If it takes more than 3 turns out on the screw to get rid of the popping put in the next larger pilot jet.

  • JVP

Posted August 02, 2004 - 07:15 AM


Besides turning your mixture screw out use a mix of race gas and premium to get the 95 octane rating. :thumbsup:


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