What Causes a Sudden Loss of Speed in a Motorcycle?

[VanVincent]

There are several reasons why a motorcycle may suddenly lose acceleration. Clogged Air Filter: Once the air filter is clogged, the engine's air intake is restricted, leading to incomplete combustion and reduced combustion efficiency, which inevitably affects acceleration performance. Fuel System Not Cleaned for a Long Time: Both fuel injection systems and carburetors require regular cleaning, with carburetors needing more frequent cleaning. Ignition System Issues: If there is a noticeable jerking sensation while riding, there is an 80% chance the problem lies in the ignition system. The most common components to fail in the ignition system are the ignition coil, high-voltage coil, and connecting wires. Engine Problems: Valve leakage, worn piston rings, and aging cylinders can all cause the engine to lose acceleration power. This is mainly due to decreased cylinder pressure, which alters the engine's combustion state, resulting in poor acceleration performance.