I have just come in to possession of a 1983 KX 500 with a 1984 engine. The bike is in fair shape, well maybe that's a stretch, closer to poor. I was told that it ran, in fact a friend of mine picked it up and said it was in a warehouse, the guy kicked it a few times and it fired up. He drove it around, they put it in a truck and brought it to me. I certainely have not been able to start it. The adventure begins. I will refrain from asking questiions until I've gone through the site and searched all the topics I can think of. I've spent my whole life well, 40 of my 53 years messing with bikes of all types, so my ego was crushed when they said "it fired right up" and it's been a week and all I get after about 10 - 20 good kicks is a big backfire. Getting plenty of fuel, good spark, poor compression, but hey, it started for them. Again, no questions for the group yet 'till I've had a chance to read. The group looks great, tons of info. for me to dig through.