Why does the motorcycle throttle not increase and make a popping sound?

[VanLorenzo]

The reasons why the motorcycle throttle does not increase and makes a popping sound are: 1. Poor quality gasoline; 2. The carburetor is too dirty, and the low fuel level in the carburetor float chamber causes insufficient fuel supply from the carburetor, resulting in engine knocking; 3. Excessive clearance between the cylinder liner and piston in the engine causes knocking when the engine is under load. The solutions for the motorcycle throttle not increasing and making a popping sound are: 1. Check if the spark plug is faulty and if there is any interruption in the high-voltage electricity; 2. Check if the air filter and carburetor are clogged; 3. Thoroughly clean the carburetor and check the carburetor's mixture ratio, needle valve, and choke.

[DelColin]

I've been riding motorcycles for over a decade, and when encountering situations where the throttle won't increase and there's a sputtering sound, it's usually one of these issues: Most likely, it's carbon buildup on the spark plugs or incorrect electrode gap, especially common in older bikes—starting up sounds like it's coughing. Then, you need to check the air filter; if the filter element is completely clogged, the engine can't breathe properly, a situation particularly common after rain. The fuel system also needs inspection—if the fuel pump isn't delivering fuel properly or the carburetor nozzle is clogged, the power will be intermittent. If the exhaust pipe is blocked by mud or the muffler is damaged, that sputtering sound becomes especially noticeable. Lastly, don't forget to check the ignition coil; if it's faulty, it can cause a misfire, making the bike shake like a massage chair. Regular maintenance is key—change the spark plugs every 20,000 kilometers and check the air filter before every rainy season.

[VonJonathan]

Last time my motorcycle suddenly lost power when accelerating and made popping noises. It turned out to be a fuel system issue. Too much debris in the tank clogged the filter screen, making it hard for the fuel pump to draw gasoline. If the carburetor jets get clogged with gum deposits, it's even worse - the air-fuel mixture gets messed up and the engine can't breathe properly. Another possibility is a faulty throttle position sensor sending wrong signals to the ECU, causing inaccurate fuel injection. Also, pay attention to fuel quality - gasoline mixed with water causes severe carbon buildup in the combustion chamber, especially noticeable through knocking sounds during cold starts. I recommend first draining the tank and replacing with fresh fuel, then cleaning the carburetor. If that doesn't work, check the electrical system. Don't force ride with this problem - it damages the engine.

[VanEden]

Engine sputtering and inability to accelerate are mostly caused by ignition issues. A cracked ignition coil can cause electrical leakage, and loose connections on the high-voltage coil can lead to unstable spark plug firing. When a cylinder misfires, the exhaust pipe makes loud popping sounds. Check the spark plugs for oil contamination or breakage—plugs with incorrect heat ranges can overheat and melt the electrodes. If the magneto rotor is misaligned, incorrect ignition timing will cause the engine to jerk. If you're doing it yourself, start by replacing the spark plugs, testing the resistance of the high-voltage wires, and remember to use anti-static gloves during disassembly and installation.