In the service notes from the Trident owners club, somebody has designed a gizmo for stabalising the voltage to the ignition when using the electric foot, Tridents are suseptable because they have 3 coils, which should apparently be 4v, but are frequently 6v. If I can find the circuit I will put it on here, I'm not a electrical type person so there may be loads of reasons why this wont work.