1986 trx125 ignition problems. Help!

Hey guys, i was trying to see if any of you had encountered this before. My wifes atv was running great last week. While it was running i shut it of and tried to start it back up a minute later. It wasnt starting so pulled plug out and no spark. I went in the garage today and just pulled it see what would happen and it sparked for probly 4 pulls, then nothing again! Ive never encountered this and hoping some of you could help me out thanks!

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