Bayou klf300b clutch issue

Oh, by the way, heads are the same but rear cam is different. Looks like rear cam has a," raised radius along the face of the seating end". I trying to figure that out. Ive been staring at pics all morning and still cant figure it out.
 
Oh, by the way, heads are the same but rear cam is different. Looks like rear cam has a," raised radius along the face of the seating end". I trying to figure that out. Ive been staring at pics all morning and still cant figure it out.
 
UPDATE: got my last crucial part for the quad, it runs but spits through the carb when I give it gas. i gotta figure that out, but its coming together!