I put brand new copper crush washers,and no ticking noise for @5000 miles.I had also put on those fuji lock nuts. Sir jim i called it a EGR vavle by mistake,however it operates as a car.Its proper name is REED VALVE ASSEMBLY oem part #12021.My mechanic has relaced many on the cbr1000's.And it sounded the same to him,but why it went away at idle is why he said cant be that.Yes i am thinking the valves,but dont they tighten up? hence noise would be if they loosned up? And then again why only now at that RPM? Thank you for the reply's!