Why does the engine throttle fluctuate up and down?

[DelValeria]

Engine throttle fluctuation can be caused by a clogged air filter; malfunctioning or faulty intake sensor; dirty fuel injectors, etc. Solutions: If the fuel tank negative pressure switch is clogged or the negative pressure suction pipe is leaking, preventing normal fuel flow, it is necessary to unclog the fuel tank negative pressure switch and repair the negative pressure suction pipe. If the carburetor is clogged or there is water at the bottom of the carburetor float chamber, the carburetor should be unclogged and the water at the bottom of the float chamber should be removed. Precautions: Always allow the engine to cool down before washing the vehicle. Suddenly rinsing the engine, exhaust pipe, and other components with cold water can cause damage due to thermal expansion and contraction, which is a well-known principle. This can damage the oil seals in various parts, leading to engine oil leakage—many motorcycle enthusiasts experience minor engine oil leakage for this reason. It can also cause the chrome plating at the connection between the exhaust pipe and the engine to peel off, oxidize, and rust.