If your bike runs but stalls as the revs die, it could be due to issues with the fuel system, spark plugs, or air intake. Check for fuel delivery problems, inspect spark plugs for fouling, and ensure the air filter is clean. If issues persist, consulting a mechanic may be necessary for a thorough diagnosis.
Too many unknowns without specifics for this question. What bike what fuel system etc..... at a basic level, could be issue with vacuum. spray crc or similar around the intake boot to see for rev fluctuations. If its a carby with a diaphram it could be vacuum issue inside, like hole in the diaphragm or the slide letting air through or no proper sealing, etc could be blocked main jet.
Clean the carb,check spark plug and air filter
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If your bike runs and then stalls as the revs drop, it could be due to various issues. Check for issues with the fuel system, such as clogged fuel filters or a malfunctioning fuel pump. Additionally, inspect the spark plugs for fouling, and ensure the air intake and throttle body are clean. If problems persist, it's advisable to consult a mechanic for a thorough diagnosis.
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