2010 yz 450 need help won't run

I just bought a 2010 yz 450 seemed to run great rode it for about a hr and a half a at a friends then took home and washed. When I went to start it after the kick starter hung up and at about  a 1/4 of a kick and wouldnt go any further tried roling it back in for in gear on the stand but still hung up so I pulled the clutch and valve cover magicaly the motor is free again kickstater works but almost seems to easy like i can push it down with my hand with out to much force. I did try putting it back together and start it but won't start. checked spark and also seems inconsistent when I turn the motor any advice on where to go would be awesome I stuck please help

 

Hmmmm pull the cylindr off you may have rings broken or failed

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