What causes abnormal noise and failure to start when using the electric starter on a motorcycle?
2 Answers
Motorcycle starting issues with abnormal noise and failure to ignite can be caused by a weak battery, poor battery cable connections, faulty grounding wire connections, or malfunctions in the starter relay or starter motor. Below is relevant information about motorcycles: Definition of motorcycle: A motorcycle is a two- or three-wheeled vehicle powered by a gasoline engine, steered by handlebars that control the front wheel. It is lightweight, agile, and fast, widely used for patrol, passenger and cargo transport, and also serves as sports equipment. Motorcycle classification: Road motorcycles can be divided into three main categories: supersport motorcycles, touring motorcycles, and cruiser motorcycles. Since these motorcycles are primarily used on smooth paved roads, they are also known as urban motorcycles. Two-wheeled motorcycles are the most common type, referring to motorcycles equipped with two wheels. Both supersport motorcycles and touring motorcycles possess the functionality of sport motorcycles, so they can also be classified as sport motorcycles.
Whenever I encounter this issue, I immediately think of the starter motor. When pressing the electric ignition, there's an abnormal noise but the engine doesn't start, mostly because the gears inside the motor are stuck or worn out. Each attempt to start only results in the motor spinning freely, producing a buzzing or rattling sound. Insufficient battery voltage is also a common cause, especially noticeable in cold winters when the power isn't enough to support a normal start, barely making the motor move. It's also necessary to check if the relay is faulty, preventing the current from passing through, or if there's an issue with the solenoid. Loose battery terminals can cause this too—try tightening the screws yourself. If not repaired in time, it might accelerate the motor's failure. I suggest wearing gloves to feel the relay's temperature; if it's excessively hot, it indicates excessive current causing the abnormal noise. In summary, the troubleshooting sequence should start with the battery, then the motor, and finally the complex circuits to avoid unnecessary expenses on major repairs at the workshop.
