I would say that too soft of a rear axle (or rear setup) is causing the cycling.

Inside front wheel can only lift if you have oversteer and are countersteering. Or the kart’s bent.

As my dad noted, probably too soft in the rear. You have too much rear lift, that’s lifting too harshly, causing the kart to break free and needs countersteer to keep it in check.

Take front grip out by narrowing the front, removing caster, softening the torsion bar or stiffen the rear slightly to keep it from bouncing and lifting too quickly. Wider rear track might also help.

If your kart is actually pushing with max caster, full front width, and stiff front bar, you either have a bent kart, the seat is in the wrong place, your driver isn’t feeling what the kart is doing correctly, or your driver needs to slow down his/her entry points.

If the kart is oversteering and lifting the inside front, it for sure isn’t “tight”.

Sometimes being so “over the top” on the front setup, like you have now, can cause the kart to push.   I’d agree with TJ though, the kart probably isn’t pushing, or it could be pushing initially, then snapping loose and causing the driver to counter steer, which is the only logical way the inside front tire can lift.

Your front end setup is what I would call Max Front Grip.  Obviously the balance between the front and the rear of the kart isn’t there right now.  Go back to more of a baseline setup in the front and re-evaluate the setup.  Maybe a seat position change is necessary.  Is the inside rear tire lifting quickly or dropping quickly?…or even lifting at all?  How much wheel input is necessary to induce lift?

You kinda need to evaluate these things in terms of sequence.  Whats happening and when?

So you have so much front grip, that it is very harshly lifting the inside rear on turn-in, resulting in the outside rear being heavily loaded very quickly, causing it to break traction and go super free mid-corner. Hence the oversteer and inside front lift.

All signs point to taking grip out of the front.

I had an Arrowax6 that would lift the inside front exiting certain corners.  Nothing wrong with it.   Best handling kart I ever drove.

Patrick

Check for fatigue cracks on the frame, all over, seat uprights, seat struts, frame rails, cassette brackets, spindle yokes, etc. Just to be safe.

A hairline crack under front frame rails could drive one crazy like this. Just a thought, please let us know. Fast Freddy.