orange evo 4 headset size

Re:

So the cups are already in the frame?

If so then it’ll be you assembling the headset incorrectly. Either wrong order or a part missing.

If you are unsure it’s probably best to buy a complete headset and have it fitted by someone.
 
Re:

Post a picture of the headtube and a picture of the headset parts in a exploded way in the order you are trying to fit them

A quick google says it’s a 1 1/8 headset.
 
If it uses caged balls it's very easy to put the cage in upside-down which will jam the headset on tightening. Usually it's ball-side down on the bottom and ball-side up on top, but designs vary.
 
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