Hi all - as the title suggests, my CB350 is only firing on its left cylinder. Pertinent details:
[list type=decimal]
[*]It is a rebuilt engine and was started for the first time
[*]I am running a Pamco electronic ignition
[*]I used a timing light, and the left cylinder (the working one) is a little advanced, and the right cylinder (non working) is right on
[*]I am getting fuel as it is coming out of the RH exhaust
[*]When i manually open the throttle on only the RH carb, nothing happens (duh)
[/list]
Here are my thoughts/questions and some next steps I may take:
[list type=decimal]
[*]The strobing timing light (with inductive pickup) clearly senses a signal to the RH spark plug because it lights up, but could there be a scenario where the plug is getting electricity but isn't sparking?
[*]Could the fuel/air mixture be too rich? Sometimes when i turn the choke off, the revs climb without any input to the throttle. I usually freak out and immediately turn the engine off, but now i'm wondering if that was when the RH cylinder was actually firing. I've adjusted the fuel/air mixture screws on both carbs around the same - 1 turn out from all the way in. I will try adjusting that.
[*]If that doesn't work, next step is swapping the parts one at a time to try to isolate the problem - spark plugs, coils, carbs
[*]The carbs were rebuilt by me a long time ago. I may tear into it and look into that after the above.
[*]I haven't tested using a compression tester yet, someone told me that since it's a rebuilt engine, it wouldn't give an accurate reading before it was broken in anyway, true? The thumb-compression test seems to pass though.
[/list]
I think that is all, any help would be much appreciated!
[list type=decimal]
[*]It is a rebuilt engine and was started for the first time
[*]I am running a Pamco electronic ignition
[*]I used a timing light, and the left cylinder (the working one) is a little advanced, and the right cylinder (non working) is right on
[*]I am getting fuel as it is coming out of the RH exhaust
[*]When i manually open the throttle on only the RH carb, nothing happens (duh)
[/list]
Here are my thoughts/questions and some next steps I may take:
[list type=decimal]
[*]The strobing timing light (with inductive pickup) clearly senses a signal to the RH spark plug because it lights up, but could there be a scenario where the plug is getting electricity but isn't sparking?
[*]Could the fuel/air mixture be too rich? Sometimes when i turn the choke off, the revs climb without any input to the throttle. I usually freak out and immediately turn the engine off, but now i'm wondering if that was when the RH cylinder was actually firing. I've adjusted the fuel/air mixture screws on both carbs around the same - 1 turn out from all the way in. I will try adjusting that.
[*]If that doesn't work, next step is swapping the parts one at a time to try to isolate the problem - spark plugs, coils, carbs
[*]The carbs were rebuilt by me a long time ago. I may tear into it and look into that after the above.
[*]I haven't tested using a compression tester yet, someone told me that since it's a rebuilt engine, it wouldn't give an accurate reading before it was broken in anyway, true? The thumb-compression test seems to pass though.
[/list]
I think that is all, any help would be much appreciated!