All: Last week I noticed (for the first time) that my bike was burning oil. Dark smoke was spewing from the exhaust every time I accelerated. The smell of burnt oil was unmistakeable. I was thinking, this was gonna be an expensive fix. Maybe it's the rings, or some seal, either way, expensive. I took my bike to my trusted mechanic who cemented my fears of an expensive repair, but before spending too much, he recommended switching the oil to a thicker semi-synthetic. I switched from a 10-40 Honda dyno to a 20-50 Golden Spectro semi-synthetic. He said that if it were going to work, we'd see in 150 miles. And if it doesn't work, we'll cross that bridge when we get to it. Well, I'm very happy to report that the simple oil change worked!!! After abut 160 miles, there was no more smoking. I've checked it over and over, and I've driven about 400 miles now and no smoking. The bike is running wonderfully. I don't know the exact mechanics of how or why it worked, but it has. So to anyone with a comparable situation, try changing the oil to a more viscous synthetic type, and see what happens before you spend money opening up the motor.