Today, we added metal L-Brackets to the battery/motor box to make sure it is stable and won't fall apart. We also added another wooden piece underneath the box so the chain is really tight. We tested the bike and have run into a problem with the chain skipping at the beginning of the throttle-on. We think this is due to the chain not surrounding our motor sprocket enough.
EDIT- We came back after class and added a new sprocket to the outside of the chain to push it in more, so that it's tighter around the motor sprocket. We tested it off of the ground, with no one on it, and it runs smoothly and very fast. Once we put someone on it, the motor cannot seem to push the weight and works if you do not give it much throttle but if you go full force, the chain pops off.