I have a 98cc Lifan. Like many others, I do not want the crankcase breather tube connected to the carb, so I ran it down (removed the one that was there and installed a length of 3/16th fuel line) and zip-tied it to my engine mount. I noticed the other day when I put my finger on the end of the tube (engine was off) that there was foamy oil in the end of it. I squeezed it and a few more drops of foamy oil came out. So I'm just wondering, is this normal? Been riding this bike for almost a month now, and the engine runs just fine and pulls pretty nicely.