i have a 05 cbr1000 rr when i give it gas i hear a rattle and i thought it may of been my keys so i took all the keys of (including the ring) and it still does it but it sound like its comeing from the top end i know a bit about motorcycles i have been around sportbikes my whole life and this is a new one on me but it only does it during a load on the bike like taking off or givving it gas to pass some one say 5th at 70mph no down shift but you can rev it in nutrel and it will not do it only on a load and i dont want to mess the bike so i dont know if the valves need to be adjusted or if the chain is slapping some where or what but can somebody please HELP.............. you can email me at blueeyedmike1982@yahoo.com or just leave me a message hear.I just dont know what it is and it is boyhering me it runs like a bat out of hell but it has that rattleing noise.

Thanks Mike

 

that sounds like the valves motorcycle engines are basically the same as car motors just on a much smaller scale. i dont know if they need to be adjusted try running some good fuel system cleaner through it first and see if it eliminates the noise if not then they do need to be adjusted but i am 100% sure it is the valves or maybe just one valve..