What Causes a Motorcycle to Stall When Decelerating?
1 Answers
Motorcycle stalling during deceleration can be caused by carburetor malfunction, carbon buildup in the spark plug, or fuel entering the vacuum tube. Carburetor Malfunction: Engine stalling issues are often related to the carburetor, which controls the air-fuel mixture. If the upper part of the carburetor's needle clip is faulty, preventing the needle from lifting with the plunger, the fuel supply will be insufficient. This results in a lean air-fuel mixture with inadequate combustion energy, causing the engine to stall during deceleration. The solution is to promptly inspect and repair the carburetor. Carbon Buildup in the Spark Plug: If carbon deposits accumulate in the spark plug gap, they can absorb some of the fuel, leading to insufficient fuel supply and an overly lean fuel-air mixture. The solution is for the owner to clean or replace the spark plug as needed to ensure better ignition performance. Fuel Entering the Vacuum Tube: A malfunctioning automatic fuel valve at the bottom of the fuel tank can cause fuel to enter the vacuum tube, hindering fuel return. If the vacuum tube leaks, it can also make the motorcycle prone to stalling. The solution is for the rider to regularly clean the fuel tank and check the vacuum tube for signs of aging to prevent such issues.
