Ignition mounting arrangement in internal-combustion engine

An ignition mounting arrangement in an internal-combustion engine, wherein a CDI ignition coil unit comprises:

• a flywheel with a magnet;
• a generator coil;
• an ignition timing detecting means for detecting an ignition timing based on the rotation of the flywheel;
• an ignition controller for controlling the ignition timing;
• wherein the flywheel is disposed at one end of the crankshaft;
• wherein voltage generated by the generator coil as the flywheel turns and the ignition timing detected by the ignition timing detecting means are controlled by the ignition controller so as to output a high voltage to a spark plug;
• wherein the CDI ignition coil unit comprises an igniter which is integrally configured of the generator coil, the ignition timing detecting means and the ignition controller;
• wherein the igniter includes a pair of core portions of the generator coil, the core portions being arranged substantially parallel to sandwich the igniter therebetween, thereby providing the igniter with an analogous layout to a transistor magneto ignition type coil unit to facilitate changing the ignition system into an engine having a transistor magneto ignition system, and the flywheel to be mounted can be selected in accordance with the CDI ignition type coil unit.