When you downshift on a motorcycle and release the clutch to slow down, the engine's higher RPM (revolutions per minute) and the lower gear engage with the transmission, which creates engine braking. Engine braking occurs when the resistance of the engine, caused by the lower gear, slows down the motorcycle without the need to apply the brakes.
Releasing the clutch while downshifting without applying the brakes can have a few effects:
Deceleration: By engaging a lower gear, the engine's increased resistance slows down the motorcycle. This can be useful for controlling speed when descending steep slopes or approaching corners.
Increased engine braking: As the clutch is released, the engine braking effect becomes more pronounced. The engine's compression forces help slow down the motorcycle. However, it's important to note that excessive downshifting at high speeds can cause the rear tire to lose traction, so downshifting should be done gradually and in sync with the bike's speed.
Rear wheel traction: Releasing the clutch abruptly while downshifting can lead to a sudden change in engine braking force, which may cause the rear wheel to momentarily lose traction. This can result in skidding or instability, especially in wet or slippery conditions. It's important to be smooth and gradual when releasing the clutch during downshifting to maintain control.
While using engine braking as a technique for slowing down is common and can be effective, it's essential to supplement it with proper use of the motorcycle's brakes. Coordinating both engine braking and the application of brakes provides optimal control and ensures a safe and controlled deceleration.