Trust Register plug NGK spark plugs
Use: for agriculture, forestry and marine industries for motorcycles and four-wheel vehicles,
Features: built into the spark plug ceramic resistor （ 5 k Ω ）,
Spark ignition noise, reduced car radios,
Remove noises such as car phones.
Also prevents the electronic fuel injection control system malfunction.
Search with part number, please check the manufacturers site.
I wanted to plug the required performance of the ignitability of
Have better stuck into the combustion chamber （ in other words spark location is in the center of the combustion chamber better near ） is going
So sticking to the opposite electrode heat becomes vulnerable to the thermal problems of overheating, プレイグニッション, outer electrode deterioration.
As the high-performance, high-output engine combustion chamber temperature increases generally strong vibration of the engine itself.
Therefore, we recommend plugs as tuning progresses and inflammation of insulator and electrode are vulnerable to combustion chamber shape.
Will description plug selection steps in consideration of more things.