Starts but doesn't keep running

Hi,
Looking for guidance please, scooter has been running perfectly fine this year until the other day, engine will start but only runs for a few seconds before it stops with all the symptoms of running out of fuel, carb has been stripped and jets cleaned several times to no avail. Spark plug is always wet after attempt of starting.
Checking for spark, if normal kick start there is no spark, put scooter on block to increase kickstart travel and a spark is evident although not very strong.
Would I be correct in suspecting the CDI unit of the Varitronic ignition system.
Thanks in advance for any guidance.
Norfolk
Looking for guidance please, scooter has been running perfectly fine this year until the other day, engine will start but only runs for a few seconds before it stops with all the symptoms of running out of fuel, carb has been stripped and jets cleaned several times to no avail. Spark plug is always wet after attempt of starting.
Checking for spark, if normal kick start there is no spark, put scooter on block to increase kickstart travel and a spark is evident although not very strong.
Would I be correct in suspecting the CDI unit of the Varitronic ignition system.
Thanks in advance for any guidance.
Norfolk