Why is it difficult to start a scooter?

[McCamille]

Scooter cold start difficulties are caused by the following reasons: 1. Fuel aspect: In cold weather, the temperature of gasoline drops significantly. This type of gasoline does not vaporize easily in the cold carburetor, resulting in too little gasoline in the air-fuel mixture, making the mixture too lean. This lean mixture is not only difficult to ignite but also burns slowly, making the engine hard to start. 2. Lubricating oil aspect: As the temperature drops, the viscosity of lubricating oil increases, its fluidity deteriorates, and the engine's starting resistance increases. When using the same electric or manual power to start the engine, the rotation rate of the crankshaft connecting rod mechanism decreases, and the compression force on the air-fuel mixture in the cylinder is insufficient, making it difficult to start. 3. Electrical current aspect: For motorcycles that use battery ignition, in winter, the viscosity of the electrolyte in the battery increases, and its fluidity and diffusibility deteriorate. The chemical reaction cannot proceed completely, resulting in insufficient power and affecting the start.