Only
use an interference-free spark plug cap!
(recommended NGK caps with 5kOhm internal resistance)
Malfunction sources :
Doesn't start :
You can check the function of the ignition by unscrewing the spark plug, leaving it in the plug and connect to ground. By moving the kick starter you can see or hear the sparks.
To check the cable connecting and the supply voltage put both dipswitches down. Now the spark plug must fire continually.
Sporadic engine cutout :
If sometimes the engine suspends for 2-3 seconds while driving and keeps running thereafter normally that means that the ignition has been reset. The causes of this malfunktion could be a broken spark plug connector or a loose ignition cable.
But in most cases a bad connection to the operating voltage supply causes this effect (starter lock, fuse holder etc.). For testing you can connect a wire directly from the ignition box power supply to the positive terminal of the battery. If the ignition now runs perfect, you've got an malfunction in the wiring harness. With points such a malfunction is not noticeable, because a short break of the power supply doesn't matter. In contrast electronics are very sensitive to weak power supplies.
