If your Honda Activa 3G scooter engine is stalling or stopping when you slow down, it could be due to a few potential issues:
Idle Speed: The idle speed of the engine may be set too low. When you slow down, the engine may not have enough momentum to keep running at a low idle speed, leading to stalling. Adjusting the idle speed to the manufacturer's recommended specifications can help resolve this issue.
Carburetor Issues: The carburetor may be dirty or clogged, causing fuel delivery problems. A dirty carburetor can restrict the flow of fuel, leading to engine stalling. Cleaning or servicing the carburetor can help ensure proper fuel flow.
Air Intake Issues: There may be a problem with the air intake system, such as a clogged air filter or a malfunctioning air intake valve. Insufficient air supply can disrupt the fuel-air mixture and result in engine stalling. Cleaning or replacing the air filter and checking the air intake system can address this issue.
Fuel Supply Problems: Insufficient or contaminated fuel can cause the engine to stall. Ensure that you are using clean, high-quality fuel and that the fuel lines are clear and free from blockages.
Spark Plug Issues: A worn or fouled spark plug can result in poor combustion and engine stalling. Check the condition of the spark plug and replace it if necessary.
If you're unable to identify or fix the issue yourself, it is recommended to take your Honda Activa 3G scooter to an authorized Honda service center or a qualified mechanic for a thorough inspection and diagnosis. They will have the expertise and necessary tools to identify and resolve the specific problem causing your engine to stall.