Yes, most 125cc motorcycles have gears. They typically come with a manual transmission that allows the rider to shift between different gears for varying speed and torque requirements. The exact number of gears can vary depending on the specific motorcycle model, but most 125cc bikes usually have four to six gears.
Having multiple gears on a motorcycle enables the engine to operate efficiently across a range of speeds. Lower gears provide more torque and better acceleration from a standstill or at lower speeds, while higher gears allow for higher top speeds and better fuel efficiency at cruising speeds.
Scooters typically use a continuously variable transmission (CVT) that doesn't require manual shifting. The CVT system allows for seamless acceleration without the need to manually change gears.
Ultimately, whether a 125cc motorcycle has gears or not depends on the specific model and type of motorcycle you are referring to—traditional motorcycles usually have manual transmissions, while scooters often have automatic transmissions.