I bought a CBR954 in parts to rebuild so I never heard it run but the guy spun a rod bearing. I fire it up after the rebuild and I'm getting this ticking noise. I've checked and re-checked the valves and the clearances are perfect. I replaced the CCT with OEM but it didn't help. Using a stethoscope it sounds like the noise is coming from somewhere near or around the head but I can't pinpoint a location. It seems about the same on both sides. The bike did not come with the air box flapper or HTEV exhaust valve and has aftermarket velocity stacks. Could this be making excessive valve noise? Anyone notice a difference in sound after removing the HTEV system? Aside from the noise the bike runs great. I wouldn't mind it so much if I wasn't planning to sell it.. Thanks in advance.