What is the reason for engine shaking at 2000 RPM but not after passing that range?

[Harrison]

Resonance zone, which is a normal phenomenon, you can also inquire at the 4S shop. Here is an introduction about the engine: 1. Introduction: An engine (Engine) is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, internal combustion engines usually convert chemical energy into mechanical energy. The engine is suitable for power generation devices, and can also refer to the entire machine including the power device (such as: gasoline engine, aircraft engine). The engine was first born in the UK, so the concept of the engine also originates from English, and its original meaning refers to that "mechanical device that generates power." 2. Classification: External combustion engine: An external combustion engine means that its fuel burns outside the engine; Internal combustion engine: The fuel burns inside it; Gas turbine: The working characteristic of this engine is that combustion produces high-pressure gas, and the high-pressure gas is used to push the blades of the gas turbine to rotate, thereby outputting power; Jet engine: Refers to an engine that directly generates reactive thrust by the high-speed airflow ejected from the nozzle.