09 Icon lead lag

Right front castor block is on the front pin. Will moving to the rear pin and shortening right side wheelbase tighten up the kart some? Kart is fast, but junior driver has trouble in the turns and has to back off a lot to make it through the turns.
Around mid turn is where he has trouble. Set up now to junior specs from phantom.
Left 54
front 46
cross 58
caster 8, 12
1.5 front stagger
Started with 1 inch rear stagger, gone up to 1.25