When you release the clutch abruptly during the first gear on a motorbike, it can cause the bike to stop or stall. This happens due to a lack of synchronization between the engine's speed and the speed of the wheels.
In a motorbike, the engine generates power and transfers it to the wheels through the transmission system, which includes the clutch. The clutch is responsible for engaging and disengaging the engine power from the wheels. When you engage the clutch fully, the engine power is transmitted to the wheels, allowing the bike to move forward.
In the first gear, the engine needs to overcome more resistance to start moving the bike because it has a higher gear ratio. When you release the clutch too quickly, the sudden disengagement causes a rapid drop in the power transmission to the wheels. The engine, which is still running at a higher speed, cannot match the sudden drop in power, resulting in the bike stalling or stopping.
Releasing the clutch smoothly and gradually allows the engine speed to adjust to the load and gradually transfer power to the wheels, ensuring a smooth start without stalling. It takes practice to find the right balance between releasing the clutch and applying the throttle to achieve a smooth start without stalling the bike.