Hello, I like your tensioner ideas. The second one is awesome! My tensioner stripped somehow WHILE I was riding, and loosened the chain a whole lot, which made it hit inside the casing, and snapped one side of my #41 chain!!!! I'm a cursed rider who has a break down EVERY time I ride. I've had everything go wrong, including a snapped frame. I can't begin to express my frustrations, and I literally want to give up on motor bikes. Here's my question, can I use a rear derailler from another bike as a chain tensioner with a #41 chain? And how would I do that? If you can help, that would be excellent, I need this repaired AGAIN asap. Thank you.