Is it legal for a kid to ride a home made motorized bicycle?
This all depends on your local laws. You don’t say where you live so I can’t give a specific answer. In some locations you can ride a motorized bicycle on the street if the engine can not move the bicycle faster than 20 MPH. Other locations don’t allow this at all. If you live in the United States see the link below. Click on your state. Find the link for “Other Types”. This will give you information on the scooter and moped laws in your state. These laws will also usually have information about motorized bicycles.