传统的坐式摩托车发动机台架性能试验方法是测试发动机的曲轴功率。
The traditional method for the measurement of scooter engine performances with test bench is to measure the power of engine crankshaft.
发动机的扭矩曲线比较陡，对转速比较敏感，这和坐式摩托车的要求相适应。
The torque curve of the engine is quite steep and very sensitive to the rotating speed, which are conformable to the requirement by scooters.
强制风冷系统是坐式摩托车的重要组成部分，它起着散热冷却、保证发动机温度正常的作用。
The forced air cooling is an important component of motorcycle, playing a key role in radiating heat, cooling and as well as keeping the normal temperature of engine.
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