Man up and drive it if it’s at the factory recommended setting. Lol. I’m just joking but it’s probsbly what would actually be best. I would think you need to get used to driving the kart as is. IDid it truly is excessive then less caster and/or softer front bar will help. I/we surely don’t mind answering your questions but if I just bought a new kart I would be talking to the people that sold it to me.
The closer you have the front hubs together on your spindle the more front grip you have, the further you space them apart from each other the less grip the front end has, Try adjusting the front hubs, I had the same problem on my gp kart
Not sure what chassis your on so your results may vary.
Take out caster (move top of king pin forward), narrow front end will reduce oversteer on entry but may increase oversteer on exit. Lower front ride height, stiffer axle, softer or remove front bar, tighten rear bumper, if it’s extreme, I would move the seat back.
The closer you have the front hubs together on your spindle the more front grip you have, the further you space them apart from each other the less grip the front end has, Try adjusting the front hubs, I had the same problem on my gp kart
Just wanted to note that this is incorrect. A wider front track width will give you MORE front grip. A narrower front track width with give you LESS front grip.