Try our re-instated info resource - "Aladdin's Cave" (Main menu)- sorry it's taken so long to fix
Mines done that recently in torrential rain and wind whilst pulling away from a roundabout in Ireland.I glanced down at the motor (as you do) and could see the sparks shorting from the new NGK plug caps to the cam cover.It was OK once the revs got up again tho.I seem to remember from the seventies that it's a kinda Honda thing...