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Hi,
I am having a problem with my stock carb or ignition on my 85 XLX,
it runs great at 2000 rpm and up but backfires below that.
It still has the VOES system on it,could that be the problem?

Thanks Kirk
 

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Might try this: carefully spray some WD40 around the manifold while the bike is idling......DO NOT ALLOW TO Get into the air cleaner as this will affect the test. If the bike revs up when you spray around the manifold, you have an air leak, and need new gaskets.
 
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