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Discussion Starter · #1 ·
ask a similiar question before-but now try to make simpliar-if i ran ngk br9es and didnt burn down will i need to make any changes to switch to the champions rn57ycc-cant drive much-no snow-ive driven maybe 5 miles and cant get any color on new plugs?
 

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Discussion Starter · #5 ·
drove sled today with brand new champs in it-checking color every 5 miles.rode on flat hardpack river-after 15 miles of riding mostly between 6000 and 8000 rpm's plug color was light tan on insulator-not sure if this is enough miles to leave good color on new plugs?
 
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