Chow, manager of the Motorcycle Technology Department of the Power Machinery Engineering Division at ITRI, says the pollution produced may be three to four times greater than the original.
另一方面，年輕人又流行給機車「改頭換面」，例如加裝加速管，結果使噪音變大，耗油量增加，汙染增高，排氣量擴大，「汙染量變成原來的三、四倍」，工業研究院機械研究所機車技術部經理周積鋁指出。