With inclining the speed of vehicle the cost will become low dominantly when the speed attains 750Km/h and crank length is 70mm. With increasing time the speed and force of vehicle will become periodic wave. When the crank length increases from 70mm to 100mm under 750r/m̖ 850r/m and 950r/m, the speed will increase and and the force will decrease. The force will decline with inclining rotation and crank force respectively. So it is chosen of the short crank and idling so as to maintain maximum force. The effect of crank length and rotation to force is about 20m/s and 70KN in this study. At the force with 750r/m and crank length with 100mm & 70KW it will be the lowest which is benefit for engine wear.