If a motorcycle has automatic transmission and lacks a clutch lever and gear lever, it typically means that it is equipped with a continuously variable transmission (CVT). In motorcycles with CVT, gear shifting is not required as the transmission system automatically adjusts the gear ratio based on speed and throttle input. The CVT system uses a belt and pulley system to provide smooth and seamless acceleration without the need for manual gear changes.
With a CVT-equipped motorcycle, the rider can control the speed by twisting the throttle. Applying more throttle will increase the speed, while releasing it will decrease the speed. The CVT system automatically adjusts the gear ratio to match the desired speed and optimize engine performance.
It's important to note that not all motorcycles have automatic transmissions or CVTs. Most motorcycles have manual transmissions, where gear shifting is done using a clutch lever and gear lever. If you are specifically looking for a motorcycle with manual transmission and the ability to shift gears, you should consider models that have these features.