What Causes the Abnormal Noise and Poor Acceleration When Throttling a Scooter?

[SanJourney]

The reasons for abnormal noise and poor acceleration when throttling a scooter are as follows: Reason 1: Carbon buildup on the throttle valve causing sticking, clean the throttle valve. Reason 2: Wear and tear on the throttle pedal support pin, applying grease can solve the problem, otherwise replace it. Reason 3: Poor installation of the throttle cable, if it's an electronic throttle, check the throttle pedal mechanism and the throttle pedal sensor. Related introductions about scooters are as follows: Introduction 1: A scooter is a type of vehicle between a motorcycle and a car, serving as a popular means of transportation, invented by senior engineer Corradino D'Ascanio, sometimes phonetically translated as "Scooter". Introduction 2: In Taiwan, scooters are referred to as "civil vehicles", with corresponding "military vehicles" referring to cruisers, off-road vehicles, sports cars, etc., while in Cantonese-speaking regions like Hong Kong, they are commonly called "sheep". Scooters are further categorized into many types based on form and purpose, such as children's scooters, scooters for the disabled, gasoline scooters, foldable scooters, golf carts, three-wheeled scooters, etc.

[DeIan]

I've been riding scooters for many years and have encountered situations where there's abnormal noise and difficulty accelerating when refueling. Common issues include problems with the fuel pump or blockages in the fuel supply system. Aging fuel pumps or dirty fuel filters can lead to insufficient fuel supply, making it hard for the engine to get enough fuel and causing acceleration difficulties, along with increased internal friction and noise. Additionally, carbon buildup on spark plugs may prevent ignition, resulting in crackling sounds. Belt slippage or clutch wear can also cause rattling noises during acceleration. It's advisable to first check if the fuel line is clear and if the fuel pump is functioning properly. Regularly replacing the filter can help avoid these problems. If you experience these symptoms while riding, don't push through—safety comes first, so pull over as soon as possible to inspect the issue.

[LeAugust]

Last time my scooter was making a roaring noise and couldn't accelerate properly. It turned out the air filter was completely clogged, preventing sufficient air intake which caused the fuel mixture to be either too rich or too lean, resulting in the engine struggling and making noise. Deteriorated engine oil can also affect lubrication, causing friction noises. A friend's experience suggests that a stuck idle valve or a clogged exhaust pipe can produce similar symptoms. After cleaning the air filter, the situation improved significantly. Regular maintenance, including checking the oil level and cleaning components, is crucial. Before riding, it's a good habit to rev the throttle and listen for any unusual sounds to prevent potential issues.

[ValeriaMarie]

Fueling noise and inability to accelerate are very dangerous, as they may cause the vehicle to stall midway and lead to accidents. The reasons could be fuel leakage or insufficient battery power, resulting in fuel supply interruption. The noise often comes from internal engine friction or loose belts. I recommend stopping immediately to check the fuel system and ignition system, and avoid attempting self-repair to prevent worsening the situation. For safety, find a professional mechanic to inspect the fuel pump, spark plugs, and transmission components to ensure reliability.