Electrical guru's knowledge needed! As per last post, got bike started straight away with teplacement coil (while on with original Honda coils refurb). Neutral light on in all gears so whilst doing a continuity test on the switch with ignition on, (few minutes) heard the sizzling sound from under tank - as per original coil problem - and on lifting the tank, the other (remaining coil from original aftermarket coil pair) has a gaping crack as per original post oicture. The replacement coil (a 'Hendler') wired into the same position/circuit as previous defective coil is fine. Bike runs with coil split (although I obviously won't run it from now on).
Is it a bad batch of coils (ie, both original aftermarket coils) that account for failure or can something on the bike be causing the problem? Need to establish this before fitting the original Honda refurbed coil set in case they are detroyed.
Thanks in advance
Phil