2002 ATV turn over but only start when pull in with another ATV Once you start it it will start again with starter 350 cc yahama 4 cycle Why does it start with electrical start?

sand in the starter or dead battery. make sure your battery is fully charged and stand up your ATV on its rear wheels 3/4 of the way and try to start it. itll get the sand out but make sure your battery is charged. if that doesnt work it could be your sarter solenoid. 20 bucks at Honda