Firstly, you need to pedal-assist, but your chainring sprocket is too small. If you can install a larger chainring sprocket, that'd help.
Methinks you have a Mitsubishi clone w/electric starter and pocket bike tranny. Any specs on the engine and sprockets? What size engine chain is that? My first impression is that you could climb hills better if you change your gearing. However, your speed would decrease.
What are you expecting your bike to do?