I have my bike all apart to do some painting and maintenance. I guess the stock plug is supposed to be the IMR9A-9H mine has the IMR9C-9H in it. They look to need chainging so I will do it while it is apart. Has anyone ran anything different (cheaper) in these? I found a cross to NGK CR9EHIX-9 that run about $5 a piece cheaper and they are still Iridium. Any thoughts?