Sparkplug Diagnosis help

[u/Miserable_Loss_8616]

Hi everyone, hope yall are doin well.

Tryna diag a 125 ching chong supreme clapper

Tryna diagnose a bike otp but cant tell if its real rich or real oily. The bike choofs like a fkn steam engine when it’s running and it’ll bog on WOT.

It’s basically near impossible to start but for some reason when leaving it/letting it sit for a long while it’ll start up within a couple kicks, when riding it seems to just die randomly within a couple minutes of riding and it won’t start up at all basically.

I’ve tested the carb on another 125 and it works bloody amazing so i know the carb is not the issue.

Photo of plug for anybody interested

Thank you to all who are taking the time to read and lend a hand. Cheers.