With the Honda CB250/350/CB450 the entire contact breaker plate is replaced by the Hallsensor Pickup PCB. The advance unit is disassembled, i.e. cam and springs are removed and the remaining shaft is put on again.

CB450

The installation of the pickup PCB takes place on the original fastening spots of the original contact breaker plate, the magnet disc is fastened on the remaining advance unit. Thereby it can be easily adjusted. As an additional adjustment help a LED near the Hall sensor indicates the correct position, further adjustments are not necessary.


Each cylinder has its own independent ignition, i.e. two microcontrollers for two cylinders, therefore also two light barriers. The advantage is the separately exactly computed spark advance for each separate cylinder.

9 ignition curves are available, selectable by a rotary switch at the box.