Thanks for the info about the correct Iridum plugs, Iridium plugs are the way to go. It normally outlasts the lifespan of normal spark plugs at least 10 times.
My previous bike was a Honda NC 700. Those bikes come with Iridium plugs. I bought the bike new and at about 40 000 km I thought I should change the plugs without inspecting it in advance.
So I bought new plugs and then removed the old plugs. When I compared the old plugs with the new ones, I coulnt find any wear on the old plugs. The old plugs still looked clean and brand new.
So I just put the old plugs back in place, and carried on riding with it untill I sold the bike at just more than 78 000 km. I sold the bike privately and gave the new plugs to the new owner as a gift.
Just dont fiddle with spark plug gap on Iridium plugs. Those things are very sensitive and come with correct gap settings. The electodes do not burn away. The plugs will easily outlast the lifespan of the scooter’s engine.