I went to ride my bike the other day (1996 ZX600C) and noticed it was acting very weird. Without being choked a little bit it would eventually sputter out at lights. As soon as I gave it throttle thought it was fine and pulled like it always had. Couldnt find a problem with fuel or spark so I did a compression check. I got 65, 45, 45, 45 on cylinders 1-4 respectively on a warm engine. I upon seeing that I was shocked it was even running. Wet compression yielded almost no difference. Before this it was running great and pulled almost 30mpg last fill up.
So on to the reason for this post. This bike was not very well maintained before I had picked it up. It has 27k on it and I doubt it has ever had the valves adjusted. My question is if the valves are not set up right and thus not sealing, could this be the cause for such low compression numbers? Leakdown test is coming, but I just havent had time for it yet. Any guidance is appreciated. Thanks.