I recently discovered I have been riding my KX with a broken tensioner. Before the discovery the bike rode and sounded fine except for the rattling of the cam chain which I couldn't hear all of the time. I installed a new tensioner and fired the bike up and it started to make a horrendous knocking noise. The first thing I expected was a stretched timing chain. I installed a new chain and piston @ 60 hrs on engine. I inspected the valves as well. They are in spec along with the timing. When I started the bike after rebuild it still made the noise! There is some shavings in the oil as well. Bad crank bearings? There was no up and down play in rod either. All electronics seem to be working the orange light doesn't stay on. Any help would be greatly appreciated!!!