The new bike has a funny noise with the engine at idle speed. It's a 2004 concours and still has warranty till May. I'm getting a sort of "clack" noise from the motor. It doesn't matter if the bike is cold or warmed up. Seems to go away at 2000 rpm. Any ideas? Just had an oil change done 200 miles ago, made the noise before that as well. using 10w-40 oil.