Dolphin Harbor International CO., Ltd is an old professional manufacturer on following products: First: bicycle engine: 2 stroke 48cc,60cc,80cc; new jack shaft system of bicycle engine kit; 4 stroke 41CC 49cc etc! All engines are made by CNC machine! Second: Gas scooter, Gas bike etc we do not want waste our time and energy; we care our reputation ,responsibility,service etc; we know u care ur reputation on ur customers too; we want long term business relationship, not once; WE ---ARE--THE ----BEST --FOR---YOU! Reagrds & Mr Liu www.chinadolphinharbor.comwww.cdhpower.comDolphin Harbor International CO., LIMITEDCDHpower Tech co.,ltd