After changing the plugs I'm still having the same problem. I run for a short while and then the one (left) cylinder stops running.
It seems that it is temperature related because when the bike cools down altogether she starts up and runs fine again for a short while.
I am apparently replicating Derek's (Salmaglie) problem.
I also tested the spark plug cable (left cylinder when in problematic phase) and it doesn't give out a spark.
Moe's post (above) quoting Greybeard's words of wisdom seems to be correct:
Quote
In the case of a failing coil or other ignition problem, the symptoms will be tied to operating conditions and/or temperature.
Unquote
I'm taking the bike in to the dealers on Monday.
