One side back firing

madcb450k · 06-05-2011, 04:02 PM

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.

Xmotorcycletech · 06-05-2011, 10:36 PM

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?

06-05-2011, 04:02 PM	#1
madcb450k Verified Join Date: Nov 2010 Location: Ventura, Ca Posts: 26	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.

06-05-2011, 10:36 PM	#2
Xmotorcycletech Verified Join Date: Mar 2011 Location: Monroe, NC Posts: 54	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 10:38 PM.. Reason: cant type

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