What mileage on average are you changing plugs?
Service manual PM chart show 8K mi.s - 13K km/ Yearly. First FI/ECU controlled bike for me and this just seems like it's a short plug life recommendation. With most of my previous bikes the recommendations are to check gap, wear and color for burn characteristic's. Thus, I would check plug gap, color looks good, runs good and gas mileage OK, reinstall and go. Mostly change plugs by judging the wear of the electrodes and performance.
What's the norm here?
Steve