I've had my 1000S for about a year and a half now. I've put about 5k miles on it since then. Every time I get it up to 4-7k I get a fairly loud tapping noise that matches the engine revs. My assumption was valves due to the airbox lid but I've also heard about the plug wires arching on the case but I haven't lost any power or seen signs on the wires. I mainly notice it in the lower gears but I'm sure that's because the wind noise is drowning it out when I'm in 4th or above. I do have race Termis and the matching airbox lid. I took it to the shop in Charlotte and one of the techs rode it around the shop said it sounds normal and that I should hear the superbikes. That was about 3k miles ago. I'll try to post a GoPro video of it tomorrow if I can pick up the noise. Does anyone else notice this or am I just super paranoid. She is due for the 7500 service fairly soon...