Sounds like it jumped time. When I was 14 a friend of my dad´s had one of these. It was a 1973 but didn´t run. He was wanting a riding mower and my Dad had an old one that didn´t run. I took Dad´s old mower and got it running and I traded Mr.Frank for the bike and after cleaning carbs and putting new gas in it she fired right up. It made my summers nice cause I had it to go to work and make money. Lost interest when I got my Harley 1200 Roadster. Don´t know what ever happened to it. Great bike would love to have another..