I would start checking voltages. See what you have for voltage from the stator, it will be an AC voltage, then check the input and output of the pulse generator, should see voltage on the input and pulses on the output, an old school test light works best for seeing the pulses on the output.
Check for input and output of the CDI, output can be checked at the wire on the coil. You said no spark so i assume you pulled the plug and checked it while turning it over. Check your plug wire ends, cut a bit off and reattach to the coil and plug cap to get clean connections if they look corroded. Try a new spark plug?
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1984 Honda ATC200ES "Big Red"
1982 ATC200E "Hondie"
1988 TRX300FW "Project Quad" Still in progress....