Have no spark. Changed coil & CDI box so far. still no spark. Is it the internal coil? 1989 enticer 400T/R

If you replaced those main units then you shoulda had spark unless there is no power going to the units . Check to see if the actually get 12 volts ...or 6 pending on your bike .. use a multi meter and see what kinda current is going to them and refer to your repair manual for proper voltage n amps ..12 volt no more than 30 amps ...6 volt 10 amps should be enough to at least spark threw coils . CDI boxes and other control modules are usually 10 amp either way .
Good luck and hope this helps

Hi and welcome to FixYa,
Initially, suggested checks on the wires:

• black of igniter unit tied to ground;
• orange wire from igniter to ignition coil with pulsating voltage when starting;
• gray wire from igniter to ignition coil with pulsating voltage when starting;
• IGN + 12 on red/white wire to igniter and ignition coils from engine stop switch;
• IGN + 12 on red/white wire to engine stop switch coming from 10Amp ignition fuse;
• pulsating low voltage from pickup coil between the wires black/white, white/green & yellow/red.