Mini Super Bike Blueprints Super Mini Bike Help?

Super mini bike help? - mini super bike blueprints

Me and my brother has a mini-superbike yesterday and I have some questions about it.

1. The bikes are expected to have a hand brake or two, since it only on the left side.

2. If the battery is empty pull out the battery loaded in

3. I realized that was once opened by a key, but it seems that the friend of my bros broke the key combination and Wired that if I put a pull start would be an essential starting point, because it also electric start button I have to key instead of electricity?

Thanks