Warm-up performance
Warm-up performance is the speed at which the engine warms up
after being started. The faster it warms up, the better the
warm-up performance.
Immediately after the engine is started, most of the fuel
supplied by the carburetor is in close contact with the intake
wall, with only some of fuel actually reaching the inside of the
cylinders.
Within the cylinders, the fuel becomes a diluted air-fuel
mixture with less vaporized gasoline than air, which results in
misfiring or in incomplete combustion due to unvaporized
gasoline particles.
As the engine warms up, any gasoline adhering to the intake
pipes volatilizes, enabling normal operation to be achieved.
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