Watched this video as a mate recommended the asso for my ZR160.. Sounds good, so thanks. Just 1 question.. I can hear your engine sounding quite 'diesel-like' (best way I can describe it) Mine sounds like this too.. Is this normal for the VVC160 to sound like that? Or have we both got the same problem? haha.. P.s. If anyone else reads this and knows my answer please shout !!