Motorcycle Questions? Ask a Mechanic.
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Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially and to my recollection on a Suzuki A100, the ignition/spark would work even if no battery and/or the lighting/electrical has problems. Hence, the described symptoms of "...no spark...lights do not come on..." are two (2) separate issues and therefore does not necessarily affect each other.
For the ignition/spark, proposed preliminary check (if have not been done) on the:
And for the neutral light, please check (also if have not been done) the: