W wolfie1960 Free Member Jan 7, 2024 #1 what’s correct plug for 04 classic 600. no manual and never know if correct are in it .
GoHiSK1 Well-known member Lifetime Membership Jan 8, 2024 #2 NGK BRR9ES will work fine . Shipped from factory it would have had Champion RN57YCC I personally run NGK BR9EYA in my Polaris Sleds that have Liberty engines
NGK BRR9ES will work fine . Shipped from factory it would have had Champion RN57YCC I personally run NGK BR9EYA in my Polaris Sleds that have Liberty engines
