Why? Google Maps show Covina to Colton https://maps.google.com/maps?q=covina+to... shows about 40 minutes with a personal motor vehicle. If that personal motor vehicle is a 50cc motor scooter, about 90 minutes on surface streets.

You can got via public transit, buses, with several transfers, about 3-4 hours. You cannot take "the bus" from Covina to Colton -- it takes FOUR different buses.

You can match that 3-4 hours riding a pedal bicycle.