Hi, Can anyone please give me some help on camchains ie how do you know if the chain or tensioner are knackered when the bike is fitted with an automatic self tensioner? Is the only way to open up the engine? I am used to gear driven cams you see and would just like to know if the rattle at the top end of my ZXR750L1 is normal or as a result of incorrect valve clearences or knackered camchain and or tensioner. Regards Jason