2007 Road King FLHRC with 52,603 miles. I've owned the bike from day one and have taken meticulous care with all three holes changed every 5,000 miles and just Dyno tuned at 50,705, Max Power 77.55 Torque 90.76. Currently running Stage 1 with HD Heavy Breather and Freedom Performance Tru Duals. To this point I have not done any repairs or modifications to the engine, all stock. However, I have replaced starter motor, Race Inner Bearing, Clutch Assembly and Compensator at 49,843. Also, replaced Stator at 50,705 What I'm hearing now is pinging and knock in lower gear and idle and just an array of knocks and rattles. With the exception of pings, rattles, etc. the bike runs well, plenty of torque and smooth at freeway speeds, do I need to be concerned?