Hi All, I have a rattling noise that has started on my ZZR250. It basically will start at around the idle range which is okay at 1500rpm or there abouts. Then when I rev to about 3000rpm (even in neutral or in gear) it makes a rattling noise. Sounds like there is a screw or something in the engine -if that makes sense. I've lifted the petrol tank to investigate and it seems ok. Checked spark plug cables etc. I also played with the carby (there is a screw on that / sort of near the accelerator cable - I adjusted that a little - which seems to toggle fuel or something) I hope that hasn't caused more of a problem ?! Other than that it sort of sounds like it is in the engine more up the front though ? if that makes sense? But it clearly goes away when I am over 3000/4000 rpm. Anyways I am a little lost, spewing as I wanted to go for a ride lastweek. Any advice would be greatly appreciated!! thank you!