Using the clutch to slow down a motorcycle occasionally is not necessarily bad or harmful to the bike. However, it is not the recommended or most efficient technique for deceleration in most situations. Here are a few points to consider:
Wear on the Clutch: Constantly using the clutch as the primary means of slowing down can lead to increased wear on the clutch plates, resulting in a shorter lifespan of the clutch assembly. The clutch is primarily designed for engaging and disengaging power from the engine, rather than serving as a brake.
Control and Stability: When you release the clutch while slowing down, the engine braking effect is lost. Engine braking occurs when you close the throttle and allow the engine's natural resistance to slow down the bike. Engine braking provides additional control and stability, especially in situations where you need to quickly respond to changing road conditions or hazards.
Safety and Response: By relying solely on the clutch for slowing down, you lose the ability to quickly accelerate or respond to emergencies. In critical situations, it's important to have the ability to immediately apply throttle and power to maneuver out of danger.
Brake Efficiency: Motorcycles are equipped with dedicated braking systems—front and rear brakes—that are specifically designed to slow down the bike effectively and safely. Utilizing the brakes as the primary means of deceleration ensures optimal control, responsiveness, and overall safety.
That being said, there may be situations where feathering or partially engaging the clutch can be useful, such as when downshifting to match the appropriate gear for the desired speed. This technique is often employed to smooth out gear transitions and minimize the abruptness of engine braking.
In general, it's recommended to use a combination of engine braking, proper downshifting, and applying the brakes to slow down your motorcycle efficiently and safely. Always follow the manufacturer's guidelines and consult your motorcycle's owner's manual for specific recommendations on riding techniques.