Hey, just got this kx80 for free, trying to fix it up but it wont shift any ideas?

 

It turns over, but it will not go into gear? See appendix 14-3 in your manual on shifting issues. there is a nice list of possibilities. Nothing is free, but a manual makes a give me bike worth having. but the gist is "The clutch not disengaging, the shift fork bent or sized, the gear stuck on the shaft, the gear positioning lever binding, the shift return spring weak or broken, the shift return spring pin loose, the shift mechanism arm spring broken, the shift mechanism arm broken, the shift drum broken... Good luck with the free bike