This is not a RCEXL ignition. I would guess the timing chip is under all of the black goop and circuit. It is probably a copy of the xl system from the looks of the parts I can see.
Mr. Laing Xu said some one had cloned his ignition Ha. His is a exact copy of my CH system. Looks like the chinese are cloning the Chinese.Very Funny.But I am to old to worry about it.
Send me one and I will tell you if it has a timing control and how it works.I will even send it back. Maybe I could clone it.

BCCHI AMA 2500