(RE: "80cc" Chinese engine) I'm a bit concerned that after running through barely a tank of fuel on my new engine, I'm seeing lots of leaking. The biggest leak seems to be coming from around the bottom of the fuel line (yes, when tank is switched of). It's hard to tell for sure though. The fuel line seems to be pushed in tight, so maybe it's something else. The leak that concerns me the most though is the head gasket. It's not pouring out, but it seems to me that if it's leaking at all, I'm screwed - right? The engine does seem to be running a little rougher than when I first got it. And I was dismayed to discover that my initial fuel mix was probably wrong. I didn't have time to install this kit myself, so I had a motorcycle gearhead do it for me. The guy has his own shop, so perhaps I took for granted that he knew what he was doing. When we fueled it up for the first time after installation, the mix was 4oz oil per gallon. I didn't question it, and I should have. After running through most of the tank, I realized that the break-in mix should be closer to 8oz per gallon! Can I blame this head gasket leak on his bad initial mix? Is there any solution to the leak besides replacing the gasket?