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So at 20k I thought it prudent to put new plugs in..but was stunned at how good the plugs looked! They looked brand new! But..still put the new NGK's in...will carry these for spares.
I put a set in every spring after the winter gas with Seafoam has run through. It's total overkill, but they're like a whopping $5 a pair for the standard HD's.
Yep...gone are the days of old where you swap plugs every trip. EFI bikes and newer technology make things run more efficiently so no need to waste the ca$h.