Hey, so pretty recently, about 2 weeks recent, I got myself a Suzuki dr 400, 1980 specially, and it is getting literally zero compression, but it has spark. I have been told that it is the rings, the seals, the gaskets, and the valves. But the only problem I have, is first, there is no manual to repair this bike that I have found. And second, I have had a bugger of a time finding places that sell parts. So I have been trying to take it apart without breaking anything to figure out exactly what I need to buy, and I have had no luck. So if anyone has any info available, I would be extremely grateful to you! Thanks