Great replacement plugs
It was correct heat range for my small engine predator 3500 series generator.
These work fine for my two coleman mini bike ct200u. The kids ride them all the time and the plugs need changing/cleaning every 8-12 months. Easier to just change them. Mainly my sons bike he is hard on it and has been tweaked a little for speed. My daughters does not have to change as often it is still stock.