Why does the Suzuki EN125 lack power?

[StDominic]

Here are the specific reasons for the lack of power in the Suzuki EN125: Fuel supply system reasons: Due to the blockage of the fuel tank vent hole, fuel valve, fuel filter, and the fuel pipe between the fuel tank and the carburetor, the required fuel supply cannot be met, resulting in a lean mixture and weak engine performance. Ignition system reasons: Incorrect ignition timing or premature ignition causes early combustion and detonation of the combustible mixture. Faults in the ignition system can lead to spark plug misfire or weak spark. Cylinder compression pressure: Severe wear of the piston, piston rings, and cylinder increases the clearance between them, reducing sealing performance. This leads to cylinder head leakage and decreased cylinder compression pressure.