Hello

I have a simple question about the standard stock two pole magneto cdi. I want to know what the factory set timing is on an engine. My question is when does the module fire? Is it when the last retreating magnet goes past the first pole or at some other point? The engine is a pouland 25cc and I suspect by the way it starts so easy it is set pretty low maybe at 12 degree BTDC.

If someone would please explain when the spark is generated I can go from there to the current timing and how to bring it up to 27 degree BTDC which works great with my CDI system which I am building.

Thanks
Dan