I always recommend examining the spark plugs at least once a year, since the plugs are the only window into your cylinder. You can monitor carbon build-up (if any), adjust fpr rich/lean conditions, check the plugs for any cracks in the insulator material, check for burning oil deposits and give a quick cleaning if needed. This applies if the plugs are easily reached. I have to take them out anyway to fog the cylinders for winter storage. I was getting knocking on the Meanie, so the plug condition told me it was running too lean, which tells me it has an ignition map that is not too conducive to gentle cruising.
Regards
Regards
