The title of our project is ATV (All-Terrain Vehicle) quad bike. It consists of four wheel drive. The main purpose of our project is the conversion of four stroke two wheeler petrol engine to four stroke four wheeler petrol engine. In this suspension system will be more compared with normal bikes. It can run in any path (mud,rockysurface) In this we are using 150 cc petrol engine having 5 gear transmission and it carries about 200 kgs load. We are designing the frame in auto cad software and fabrication will be done with required dimensions.