KZ250 Ignition problem

Hi guys & Girls, I have a problem with my ignition.
I have a good spark, but the motor is not firing, and seems to be kicking back a bit. when I tested it with the strobe it seems way too far advanced, I suspect the ignitor, but would value your opinion.
Is there any way of adjusting the timing on the electronic ignition models?
Thaks for you help in advance.

is it a 1983 ?

Hi, sorry for being so vague in my description, it is an 85 KZ250 W1 LTD, all electronic ignition.
Thanks

I have a 83 manual and it says the ignition is not adjustable ..

Try a new spark plug , you are getting fuel ? is the spark plug wet when you take it out ?