I finished putting my bike togather last night after do the BK, gray wire, and YZ timing mods. I started it this morning before work to see if all was good. It started first kick, but was making a solid knocking noise at idle. I shut it off after about 10 seconds when the noise didn't stop immediately. I couldn't do any more checking because I was late for work. The motor definitely didn't make this noise before. All tools and parts were accounted for before valve cover went back on, I'm pretty sure nothing went in the motor. I checked the valve clearences after the timing change and they seemed right on. Any ideas or similar experiences? Could it be that the oil pressure had just not come up yet?