Why does the motorcycle stall when the choke is turned off?
2 Answers
Motorcycle stalling immediately after turning off the choke is likely caused by insufficient fuel supply or an overly lean air-fuel mixture. Check the fuel tank level: When the choke is open, the air-fuel mixture becomes richer, allowing the engine to start. If the motorcycle stalls as soon as the choke is turned off, this is basically the problem. You can check the fuel tank level and the carburetor. Carburetor cleaning: During normal operation, the choke should be open. In cold weather, you need to close the choke to make starting easier. If the motorcycle hasn't been ridden for a long time, the carburetor may get clogged. It's recommended to take it to where you bought it and have a mechanic disassemble and clean it. Before leaving the motorcycle unused next time, close the fuel tank valve and drain the carburetor to prevent this issue.
I've been riding motorcycles for over a decade and have seen plenty of cases where the engine stalls as soon as the choke is turned off. The main issue usually lies in the incorrect air-fuel mixture ratio in the carburetor. When the choke is closed, more air enters but the fuel supply can't keep up, resulting in a lean mixture that causes stalling. If the bike is relatively old, the carburetor's air passages might be clogged, or there could be some blockage in the fuel line affecting smooth fuel delivery. A common mistake I've seen many beginners make is rushing to turn off the choke before the engine has properly warmed up. My suggestion is to first check the carburetor's condition and ensure the fuel lines are clear, then try adjusting the mixture screw. If you can't fix it yourself, it's best to take it to a repair shop to have the carburetor tuned, and also have them check the spark plug gap as it affects combustion. Regular maintenance is crucial too – frequent carburetor cleaning helps prevent blockages.
