So youre talking about motor scooter engine spark plugs, is that right ?
Oh goodness, don't get him ....oh, never mind....
A very nice little spark plug for the KYMCO LIKE200i is the Iridium plug made by Denso , or NGK.
I preferred the color of the NGK to the Denso after a few 100 miles. But that just might be my engine.
Email to NGK says to use same heat range as the standard plug.
Because, some say Iridium plug is hotter, therefore go to one range cooler.
Not so NGK spokesman says. NGK took all things into consideration when marketing the Iridium plug - use the same plug heat range - just added the "X".
Stig