Just joined and seems like a great site. Just started collecting sleds last year for the farm and i love it. I don't know too much about sleds and probably made a few bad purchases but you learn by experience so i don't mind the learning curve.Any info from any members is surely welcome. I will be posting pictures of my sleds in the next little while. I like old school everything when i collect things so the sleds will follow the same criteria.This site seems to have a lot of knowledgable people so i will ask this question. I have a 1977 yamaha gp440 that i was riding yesterday and today it will not run.I've found that it is now not getting any spark.If anybody could give me all the scenarios that cause this i would really appreciate it as i'm just learning about sleds. Thanks for your time.