Two things to think about:
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Many times, accelerating too hard out of a turn is an instinctive reaction to realizing that mid-corner speed is too slow. If you feel like you can/need to romp on the throttle as soon as you get to the apex (after the kart rotates), then focus on optimizing turn entry and managing rotation so the kart is truly at the limit mid corner, then you will instinctively feel that you need to roll onto the throttle instead of jumping on it.
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Often, what appears to be a ‘throttle on’ problem is actually a ‘rotation management’ problem… especially in low speed turns. That is, the timing of rotation and throttle application is critical. If you time throttle application just before (or exactly when) the kart rotates into a neutral or slightly understeering trajectory (relative to the line you are driving), then the load transfer tends to ‘lock’ the rear end down so the acceleration forces drive efficiently through the kart’s center of mass.
If you are even the slightest bit late getting to throttle (meaning the kart rotates past a neutral trajectory (or you get on the gas when the kart gets to a neutral trajectory, but the momentum of rotation carries it past the neutral trajectory) then you end up ‘spilling’ acceleration forces into the outside rear tires, which is inefficient, is hard on the tires, and ultimately limits how aggressively you can accelerate out of the turn. This means that in turns where there is a lot of rotational momentum, you often have to anticipate when the kart will get to a neutral trajectory, and you have to start accelerating just fractionally earlier then when your ‘instincts’ tell you that you should so that you can ‘check/stop’ the rotational momentum before the kart gets into an oversteer trajectory.
Last week, a KP member & top-level driver: Nik Goodfellow (@NikG) posted a P1 qualification lap video in the (Weekly) KartPulse Racer Videos Thread, that pretty well demonstrates expert rotation control. I encourage you to watch it multiple time (in slow motion too), and pay attention to how he manages the orientation of the kart on the line he is driving, throughout the whole lap… but especially pay attention to the exits of the slower turns.
