How Do I set Ignition Timing on a '64 Sears Allstate 150 Puch Motorcycle?

[bill b]

I followed the manual. It was running before and now it's not. I thought I could get it to run smoother. It said ignition should occur 11/64 before TDC. I took the spark plug out and made a mark with the piston at TDC. I made a mark on the rod I am using 11/64 higher. Using the rod I turned the piston back to my new mark. I then set my gap on the points which asks for .015. I hooked everything back up after putting the spark plug in and now it won't even turn over. All it did was pop! once in a while. Is there something I am missing? I am a real amatuer at motorcycles(just started).