This is a colder than stock plug for most stock mopeds. Some mopeds like the Morini, and Tomos A55 use the long reach B9ES.
If you have performance modifications on your engine, you might want to try a colder plug. WIth NGK plugs, the higher the number in the designation, the colder the plug, with 10 being coldest.
When it comes to spark plugs, NGK is the World Leader. Makers of spark plugs for virtually every automotive, motorcycle, marine and small engine application, NGK dominates.
NGK Spark Plugs (USA), Inc. was established in 1966 as a subsidiary of NGK Spark Plug Co, Ltd., of Japan. Its purpose was to establish and develop a market in the United States for NGK spark plugs and NTK ceramic products.