One side back firing - Motorcycle Forum
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post #1 of 2 (permalink) Old 06-05-2011, 05:02 PM Thread Starter
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One side back firing

I have a 71 CB 450 K4 and it all of a sudden started backfiring out of the left side. I don't know what caused it and I have no idea what it might be.
Any suggestions on where to start?
The carbs are synched so that was where I started, but I am unsure why only one side is backfiring.
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post #2 of 2 (permalink) Old 06-05-2011, 11:36 PM
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It could be a lean missfire ( idle mixture circuit) Fouled plug on that side or a points issue. Does it backfire all the time or just on deceleration?

Last edited by Xmotorcycletech; 06-05-2011 at 11:38 PM. Reason: cant type
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