I know this is a rookie question. But how can I tell if my chain is adjusted properly? How much slack should I have with a rider on board? I am trying to figure out if my swingarm is wearing under the chain guide because of inproper chain adjustment or just bad design. I gotta fix it soon. It's eating away at my swingarm. I just hate to have to spend a lotta time and money to fix something that shouldn't be broken. I wonder if I could warranty this.