What are the symptoms when the pulley weights of a scooter are damaged?

[McGideon]

Scooter pulley weights that are aged or worn out will cause the engine crankshaft to fail to properly lift the belt pressure plate during rotation. After accelerating, the engine speed increases but the acceleration is too slow, resulting in weak driving performance. More information about pulley weights is as follows: 1. Introduction: Pulley weights are one of the rotating components of a scooter. The pulley weights (also called moving weights, which can move radially) are influenced by the engine speed. As the speed gradually increases, the pulley weights are subjected to outward centrifugal force that overcomes the force of the large spring, moving radially along the sliding groove toward the outer edge of the disc. This increases the force that squeezes the axial movement of the moving disc, enlarges the working radius, and reduces the diameter of the driven disc, thereby changing the transmission ratio. 2. Classification into light pulley weights and heavy pulley weights: Lighter pulley weights provide stronger acceleration, requiring less time to reach a certain speed. However, during movement, the engine speed will be higher than usual. If frequently driving in urban areas, this setup is more fuel-efficient. Heavier pulley weights result in poorer power performance during acceleration, slower acceleration, and a longer time to reach high speed. However, when the pulley weights slide to the end of the pulley disc, the inertia is greater, and the engine speed during operation becomes lower, making it more fuel-efficient during prolonged high-speed driving. The heavier the pulley weights, the greater the centrifugal force generated, which shortens the car's acceleration time. However, the instantaneous torque produced on the crankshaft can be excessive, potentially leading to crankshaft fracture in severe cases. If the pulley weights are lighter, the centrifugal force generated will be smaller, resulting in slower acceleration time for the car.