weride4fun

I am a new member and was hoping i could get some good info on why my 2002 yamaha blaster atv will not run. the ignition light will not stay on when i try to start it. i put new plugs, cleaned gas. when i pulled it with my pick up with someone on it , it would start and run, now it will not even start by pulling it now. any one out there with some good advice?