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Message: [QUOTE="dirt bike dave, post: 767514, member: 18302"] Mike, I don't think the issue is burning up the CDI. The issue is the electrical interference preventing the bike from running at its full potential. Most the warnings from the mags say Honda's are most prone to electrical interference. If you have ever had non-resistor plugs in an old car, you can hear major electrical interference on the AM band. Resistor plugs will largely prevent this. From my '99 CR250R manual: "The use of a non-resistor spark plug may cause ignition problems". Note that it says 'may cause problems', not 'will cause failure'. But why take a chance if your bike calls for a resistor plug? You are not going to gain any performance by using a non-resistor plug. [/QUOTE]