btw, They are iridium.VStar650CL wrote: ↑Wed Aug 24, 2022 9:03 amThat's a healthy burn, slightly rich but not problematic. From the electrode construction that plug looks like copper or platinum, if it's copper you'll want to upgrade to platinum but keep the same heat range. Dunno about the wisdom of putting iridiums in a ride that old, maybe some of the HB mavens here can chime in.