Hey guys. I've sorted out most of my other issues with the B&W150, but i'm still having one. When accelerating, going up hills or riding 2 up, I get an annoying knocking sound from the motor. My gut is thinking this is spark knock. I have an NGKDP7EA9 in it right now, and I'm going to try running one plug colder and maybe upjetting. Anyone else getting this knock on acceleration, etc?