Once your battery is in the unit, you will need to check a few things. 1.Make sure the battery is connected. 2.Make sure the gas tank is full of premium gas. 3.Put the key in the unit and turn it to the "on" position. 4.Make sure your emergency handle bar brake is pulled in and locked. The brakes must be on for the unit to start. 5.Make sure the kill switch is not on the position with the half circle with the x inside. It needs to be on the empty half moon circle. 6.Once all this is done, press the start button and hold it down until the unit starts. If the unit does not start for a minute, then refer to the diagnostics section to troubleshoot starting issues.