XS650 won't fire on both cylinders

[Wolf0417]

I got my xs650 back after sitting for a while and it was really hard to start so I rebuilt carbs on it and did a valve adjustment, points, condensers, spark plugs and it won't run on both cylinders it'll run on the right one and if I swap the spark plug wires it'll run on the left but if I rev it up to about 2500-3k rpm it'll run on both what could be causing the issue?? I did a compression test and it has good compression as well

 

[Jan_P]

Ignition problem you was able to get the Problem shift side
As they told me at the dealer check the points and then the points and after that the Points again

 

[Adamc]

I got my xs650 back after sitting for a while and it was really hard to start so I rebuilt carbs on it and did a valve adjustment, points, condensers, spark plugs and it won't run on both cylinders it'll run on the right one and if I swap the spark plug wires it'll run on the left but if I rev it up to about 2500-3k rpm it'll run on both what could be causing the issue?? I did a compression test and it has good compression as well

Redress the plug leads from the coil to the plug caps, make sure all have good contacts. Also check / change to new plugs. After that points and timing etc.

 

[Its been a long time]

1 You change sides of a component. 2 The fault shifts sides too. 3 You just found your fault.

 

[Wolf0417]

1 You change sides of a component. 2 The fault shifts sides too. 3 You just found your fault.

So what could it be if I change the spark plug wire and it switches sides?

 

[Its been a long time]

So what could it be if I change the spark plug wire and it switches sides?

The spark plug wire. Or it's terminations, more likely.

 

[tibsy]

I had a plug cap suddenly go dead on mine last week which left me stranded-have you checked caps?

 

[Wolf0417]

I had a plug cap suddenly go dead on mine last week which left me stranded-have you checked caps?

No sir would I just use a multi meter?