Bicycles with gas tanks are often called motorized bicycles or gas bicycles. Motorized bicycles run on gas fuel and are available as a complete, pre-built product. Alternatively, motorized engine kits are available for transforming almost any standard bicycle into a gas bike.
Some examples of pre-built motorized bikes are the EZ07 and EZ08 models from EZ Cruizers. The EZ08 is a fully-upgraded, four-stroke bicycle available in several color options. The model reaches up to 40 miles per hour and averages 140 miles per gallon. Bicycle engine kits include most components necessary for a fully operational gas bike, including the motor, filters and ignition. Do-It-Yourself kits usually feature a complete user's manual for troubleshooting and installation.