I'm look to the engine experts here, but open to all suggestions. Right, whenever I rev my C1J beyond 3000 rpm I start to here a noise like something metal is loose. My first thoughts are that it is either the Valve Train of the Timing Chain/Tensioner. I haven't has a look yet, but it just doesn't sound nice.
I have a 2.5" TB Exhaust and in the top half of the rev range the metallic noise?
What else could make this noise?
Thanks Ladies and Gents