Only got my little china 66cc on this week and past one day of successful riding it's be nothing but issues with the chain. After a good ten miles, the master popped off and the 415 chain I got with it went flying everywhere. Replaced the master, and now the chain pops off the sprocket into the spokes. Every time. Worked for a good five mile ride the other night when I put crazy high tension on it before it popped off again. Now I'll have it where it looks and acts fine, but one ride around the block later and - boom - back to square one. Between the past three days I must've put over eight hours of work into it and I'm ready to give up - was hoping somebody had any ideas. It's a standard 44T sprocket, 415 chain, I've tried flipping the sprocket, angling the wheel, the sprocket is 100% centered with no wobble, I've tightened it to try to bring it in to the wheel a little more, I even angled the engine to try to bring it out to the left somewhat, tried varying levels of tension, no matter what I'm still having issues. Anything I should try that I've missed? I'm reading some people saying to file down the rough sprocket teeth? Edit to include pics.. This is without tension and before angling the engine.