Does this sound like a cam chain tensioner swap, or am I worrying too much?
stop running that engine immediately and buy a new cct and all your issues will be gone that is the sound of your cam chain slapping about its a cheap fix if you keep running it youll have to pull the engine replace valves so please get a new cct
edit: have a look at your current cct and check if you have a colored dot on it green or blue this way you can tell if its an older one or if it has been swapped before but i doubt that it has
I shop Partzilla or PartShark.... Yeah, you better not run that thing any more before you get a new CCT (and gasket). And do read up on how to do it right without losing valve timing (hint, tie wrap around cam chain at the crankshaft end to keep it from dropping down).
CCT is 1MC-12210-00-00 and 5SL-12213-00-00 gasket.
If you have the winning lottery ticket numbers, please send them along.
2008 FJR1300A - Pirelli Angel GT (Spec A) tires, RDL seat, TPMS, GPS digital speedometer (Amazon ~US$28.00).
P.S. Life is too short, and health is too valuable, to ride on cheap parade-duty tires.