I Just reassembled an XS1 engine and there seems to be a lot of slack on the back side of the timing chain. Before I installed the tensioner I was inspecting the chain and when I pushed on it, it moved until it was touching the lower/center chain guide. When I joined the cam chain both ends met up perfectly in the center of the cam gear. Also, I don't know why I did this, but I rotated the engine a few degrees before I had installed the tensioner and I heard a pretty loud popping sound. I thought I had jumped a tooth or something, but my timing marks are still where they should be... Anyway, Is it normal to have so much slack on the back of the chain?