Hello all, I'm very new to this, just got my first motor kit 2 days ago, and have been working on it since. Everything is now put together, but... When I disengage the clutch, so that the bike should be freewheeling, it clanks around. I've read many a thread, my chain is tight, and spent a lot of time aligning it. It would seem like the sprocket where you attach the chain to on the motor is getting stuck, or something of the sort. Please help?