Why Does a Motorcycle Stall When Accelerating Despite Normal Idle?

1 Answers
Evangeline
07/30/25 8:16am
Motorcycle stalls when accelerating despite normal idle can be attributed to: 1. Overly rich air-fuel mixture in the engine causing stalling. Simply put, an overly rich mixture means excessive fuel injection, typically caused by a faulty oxygen sensor or inaccurate air intake measurement. In such cases, motorcycle stalling usually indicates ignition system failure or fuel delivery issues; 2. Overly lean air-fuel mixture in the engine causing stalling, where insufficient fuel is injected. If the needle seat and emulsion tube fall into the fuel bowl, the needle won't lift with the plunger, failing to supply adequate gasoline. This results in an excessively lean mixture that may fail to ignite, naturally causing stalling during power stroke.
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