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Puerto Rico, San Juan
1 Level
707 Review
40 Karma

Review on NGK 6046 DCPR7EIX Iridium Spark by Brandon Reynolds

Revainrating 5 out of 5

Great product but should not be used on older Harley bikes.

I installed these on my Ultra Classic and had problems straight away. It turns out that a few years back Harley motorcycles used spark plugs as knock sensors, which confused the system. I had high idle issues and the solution was to switch it back to stock spark plugs. It's not really the plugs, but the manufacturer shouldn't list them as incompatible for years.

Pros
  • Ignition Parts
Cons
  • Good but not great