i got a new spark plug, pickup coil starter coil and wire and sparkplug boot. doesnt want to start. has compression of 115psi. i think its because the timing chain is pretty streched so the tensioner pushes on the chain as far as it can causing to top timing gear to move. the timing is not exact and i cannot get it exact because of the chain i think. will the tinyest bit of being off cause it not to fire and run? when i line up the timing mark on the fly wheel the mark on the top gear is just off like half a tooth too far forward. when i line up the top gear the timing mark on the bottom is between timing and firing. will it being off that little amount cause it to not fire at all? any help will be greatly appreciated. thanks