Anyway. The plug is black because it is not fully burning the mixture, which can be for a variety of reasons: Weak spark, poor timing, poor caruration to name a few.
Sometimes, if the cylinder doesn't fire up straight away, the misture wets the plug and shorts out the spark. When this happens there's not much you can do but remove and clean / dry the plug and try again. Better still fit new plugs.
Let us know how you get on!
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball
