2007 gt125r no spark

Hey guys i have a gt125r that I have purchased I got all the electrics but no spark I have a feeling it’s the wrong CDI unit the part number is 32900 h M815.. the rest I can’t make out. The previous owner mentioned about putting a 250 ecu to increase acceleration and give it more revs. To be honest I’m not too knowledgeable with bikes. Was hoping for some advice nor ideas on what it could be