It’s a lottery trying to get a good’un. I had 6 GN250 boxes from three different sellers and only two work reliably; from the last two sellers, so one each!This specific CDI though? I'm hoping the third one I buy will be my last given that the two I have work differently ;-)
https://www.amazon.com/goodfind68-Compatible-Motorcycle-IGNITER-Assembly/dp/B0B4DRXJ2Z/ref=sr_1_13_sspa?crid=WSKS3EZAFKAD&dib=eyJ2IjoiMSJ9.wm4qyyDxAS-Zu4IFz5-pbqPTzlQj_IyPBPW-soWYVX3FKUpg6CbkVjnVDFkOhCG6rLycI-EqQhGIrEvx8y_hSdWyZnS7eADx7pqhzNOQ1BST1H1y8Xm4MzWkVWD4opSVOP5ZZ5IshWPW3TcT-GLB0TOn8KSHmjG1gOGV05cjkiZgOTPbHyUFO4WjIm0tKKEOkccEQ5b19Jvg_eqUSZHKA80c64I37OABGf5QHLMCImwVjCqDn57Pch72IxdBeTcDcgS0ca3Aicpy8pdDn172OzjdXFzI-LNLxFT8oycww70.dCUnBTAefrzikc4mkEtIB8UQxo7aWXFbA48Wg_p4vhI&dib_tag=se&keywords=CDI+Ignitor+Box+Digital+Ignition+Fit+for+Suzuki+GN250+Motorcycle&qid=1719271595&s=automotive&sprefix=cdi+ignitor+box+digital+ignition+fit+for+suzuki+gn250+motorcycle,automotive,207&sr=1-13-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9tdGY&psc=1
Once you get a good one it pretty dependable, but I always carry a backup.
It’s a cheap way to get sparks compared to any other ‘genuine’ TCI replacement.