So I bought this 1973 TX650 not long ago with 3800 original miles. Figured I'd take my time and do a slow restore. Bike has mostly been untouched but it definitely sat in someones garage a long time gathering alot of surface rust. Before tearing the bike apart for restoration, I wanted to get the motor running to see if anything mechanical would be needed. Long story short after checking everything motor wise, rebuilding the carbs, getting a new rotor from Jim, updating the reg and rec, I fired it up today. It ran great and was excited. However, I noticed oil pouring out of the right hand cam seal. I'm not talking drips. It was literally running out. No big deal for a first fire up. After adjusting the carbs to get it idling nicely I blipped the throttle a couple of times to get it up to temp to check for other leaks. It then backfired a couple of times and quit running. You could tell something happened to the timing. I then inspected the mechanical advance and noticed one of the retaining clips holding one of the advance weights was MIA, and the weight was sitting crooked on the advance mechanism. Took it all apart and there was no cam seal at all!! The PO must have removed everything, including the original seal, and not put the advance assembly back together very securely. The pics tell the story. The backing plate is buggered up, but worse, the pin that goes into the camshaft is MIA and the camshaft hole that holds the pin is also buggered up. What are my options here? Any suggestions? My first thought is that I wouldn't be able to run any electronic ignition that relies on mechanical advance with that pin hole all sloppy now. Would this require replacing the camshaft?