Get fired up! NGK plugs for your Concours from Murphs'! Cheap insurance, carry a set on the road. I change my plugs at every other valve adjust, but I'm old school. We offer the "standard" plugs from NGK, Resister plugs for the 2000 and up and plain ole 'plugs' for the 99 and down.
Price is for a set of 4, and includes Priority mail shipping in the US.