high speed backfire
10-31-2010, 09:20 PM
Join Date: Oct 2010
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high speed backfire
need help 49 in a50 frame 4th gear when I get to a steady speed starts backfiring.
11-01-2010, 09:34 AM
Join Date: Dec 2007
Location: Eagle River WI
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What carb ? Water in the float?
11-01-2010, 08:09 PM
Join Date: Oct 2010
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new bendix new plugs
set@.018 new points at.022 new plug wires and new coil,float is at a heavy 1/4",ajustable main jet.
11-02-2010, 07:03 AM
Join Date: Jul 2008
Location: Central Virginia
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Did it backfire before you put the new stuff on or just start afterwards?
11-02-2010, 09:35 AM
Join Date: Oct 2010
Location: rural ontario
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Sounds like some minor tuning to me. Check your timing, check for intake leaks, check the colour of your plugs (white, tan, or dark) and make adjustments accordingly
11-02-2010, 12:50 PM
Join Date: Mar 2009
Location: Fort Worth, Texas
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Plugs should be set at .025 to .030. Backfiring through the exhaust or intake?
11-02-2010, 07:25 PM
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It would hardly run before ,backfiring through the carb, plugs soot up . I have the idle jet at 1.5 turns out main at 4.
11-02-2010, 07:48 PM
Join Date: Sep 2010
Location: Albany, Oregon
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Sounds awful rich if the plugs are sooting up....
11-02-2010, 08:24 PM
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think I found an intake leak ,how hard is that to fix ?
11-03-2010, 10:05 AM
Join Date: Dec 2007
Location: Eagle River WI
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Are you still running the brass seals or are you updated to rubber orings ? If brass I would use hi temp silicone
high speed backfire
11-01-2010, 09:34 AM
