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Condition:
NewNew
NGK Iridium IX spark plugs are a worldwide success story. Since their initial release they've proved to be a fantastic spark plug upgrade and are now successfully used in millions of vehicles around the globe.
The Iridium plug made an immediate improvement to the tick over of my classic motorcycle engine. A resistor plug is not usually recommended for magneto ignition but the better electrode seems to overcome the disadvantage of the 5k ohm resistance.