My 2014 k1300R recently bought with 12k km
Have intermittent rough idle up to die and sometimes normal,
When its rough there is black smoke also.
Previous owner have just put new spark plugs,
My mechanic saws the plugs is not firing good.
Installed new plugs and problem is gone for 1 month ( 500km) and recurring again now!
Now he sees that the problem may be bad ignition coils OR may be something related to excess gas in combustion chamber that lead to premature spark plug failure.. Or may be oxygen sensor.!?
Gs911 is clear for faults.
What do you guys think??