Which part of the ATV is hand-operated to regulate the flow of gas?

The hand-operated part of the ATV that regulates the flow of gas is the throttle. The throttle is located on the handlebar and controls the engine's power and speed by allowing more or less fuel-air mixture into the engine when it is engaged. When a rider twists the throttle, it opens a valve that increases fuel flow, resulting in greater acceleration.

In contrast, the fuel supply valve is typically found on older models or specific designs and is primarily used to turn the fuel flow on or off, rather than to regulate it during riding. The shift lever is used for changing gears, which is not related to fuel flow, while the ignition switch is crucial for starting or stopping the engine but does not have a role in regulating fuel. Understanding the function of these components is essential for effective ATV operation and safety.