Thats exactly the reason I was thinking bout switching them. Also maybe a lil smoother idling? I do this everytime I buy something used I change it out so its set for me and I know whats been changed etc. I was all set to order Iridum till I seen the V Power by NGK, sounds like could be a bit better plug? Do you recall the number of the plugs you got?I will say this the champions I took out at 2,500 miles looked great. The reason I changed them was the chatter on the forums about Iridium's being better. That and a buddy said he could smell fuel will riding behind me. Idk I never noticed it and after switching to the NGK's no more gas smell complaints.