I finally got spark.
But still can't check combustion because of that loose pedal crank chain (smaller and shorter chain). I was checking for spark by spinning the flywheel with a drill and socket.
The chain seems to be 1.5 links too long ...so I can't just remove a link. However, stretching 1.5 links seems impossible to me. That makes me think that it's an adjustment issue. I looked around for adjustment slots, but didn't find any.
Perhaps somone has done this adjustment. Can anyone help me out?