Assuming you have checked all the timing and valve operation, think about the distributor. basically all it does is open the points at the right time and connect the coil to the correct plug. Only two active positions. Engine runs on one cylinder so turn distributor through 180 degrees and swap HT leads at plugs. Try not to disturb anything else. If engine now runs on the OTHER cylinder the is a fault with one position of the distributor (bad cam, bent shaft faulty cap whatever). If the fault is the same it's highly unlikely the distributor itself is at fault.
What type of pick up did the electronic ignition use? if it was the points, changing it will not have ruled much out.
Sometimes you can get too close to a fault and not see the "obvious" try standing by the engine with someone (does not have to be someone who knows about engines) and talk through everything you have done from the beginning. This can often help clarify what is going on and separate the "wood from the trees"
Robert G8RPI.
What type of pick up did the electronic ignition use? if it was the points, changing it will not have ruled much out.
Sometimes you can get too close to a fault and not see the "obvious" try standing by the engine with someone (does not have to be someone who knows about engines) and talk through everything you have done from the beginning. This can often help clarify what is going on and separate the "wood from the trees"
Robert G8RPI.