In messing around with my bike today, I noticed that there is vapor spewing out of the hose that leads from the valve cover. I double checked the valves to make sure they aren't too tight as per the method posted on this website. I noticed that when the valves are adjusted too tight, the vapor gets worse, setting them loose lessens the vapor, but it doesn't disappear. So does this sound like I have a bad valve or two that aren't sealing well? no tools available to test compression, but I plan to check it this week at the local shop.