Cutaway vm28

Hi everyone, I changed my Needle Jet in my vm28 to corrige my rich low transition, I keep my 5cn15(they look good, no scratches). Now I have the same problem. Rich until 3/8 throttle to achieve 13 afr wot. What do you think about replace Cutaway valve could do in that case ?! I have now 1.75 cutaway.  Thank youu

A larger slide cutaway will mainly lean off 1/8th to 1/4 throttle.
You may need to fit bigger pilots once you change the slides.

Ok so thats not my problem!! 13.5 afr on idle and when I touch the throttle it drops to 10.5 afr!!!