This is the same problem I am having. My kid has a Raptor 80. I can push start it with no trouble. Good compression/spark and clean carb. I hear that I may need to adjust the valves. I think the top valve cover is the intake valve but what do I need to do to adjust it and is this likely to be my problem?

Thanks

Ken

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Ken
Brute Force 650
Raptor 80
looking for Recon 250