100 KLX 110 . When I tighten clutch cover case, the clutch disengages

My son cracked his clutch cover case. Got a new one, I can get all but 4 bolts in. When I go to tighten them down I can see the case tighten up but the clutch will disengage
 
My son cracked his clutch cover case. Got a new one, I can get all but 4 bolts in. When I go to tighten them down I can see the case tighten up but the clutch will disengage
Need a little more info to this.....what year are we talking about?
Pictures of what you are talking about.
tightening disengages the clutch?
 
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