Here you have some info regarding the ignition curves, YPVS curves and solenoids openings from the 3MA-70 CDI
(Small not: its a 1990 CDI so it has a 21 degrees base advance not the 19 from a 1989 CDI)
The data is recovered by sending a digital pickup pulse (in Hz) into the CDI in order to get accurate readings.
Precise measurements can be seen in the link's
Her you have the 3MA-70 CDI and internal circuit board.
Here you have the YPVS curve
|RPM||Airjet 1||Airjet 2|