First off hi. I am new here but not to Hondas. Currently I have a barn find 1970 CB450. It was in great shape and only 6,000 miles when I got it. I took it out for the first long (20 miles) ride and had some stuff happen. First, while I was riding it sorta felt like it was running out of gas once or twice but then ran fine after a second. (Float levels are perfect) Then when I pulled up in my driveway it dies never to restart again. It turns over with the starter and kicker but sounded like battery was weak. Charged battery to full. Still sounded like a weak battery. Checked right cylinder compression (cold engine closed throttle) and it was at 65. (I know I need to put in new pistons and rings) Starter sounded the same. Also checked for spark and there was none. Then checked the left cylinder and the motor turned over quite quickly and normally. Compression was 115 (closed throttle cold engine) and still no spark. I messed around today with it and noticed an exposed positive strap off of the battery. Taped it up and tried starting again. Smoke came off of the rectifier green wire and melted it. I know it needs a top end freshning. Question is why would there be no spark and could it be related to the near fire? I know I need to start checking outputs and resistance but the manual that I ordered three weeks ago along with other parts from oldbikebarn still haven't came in so figured if anyone here has had similar problems could save a little time. Thanks.