Welcome!
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Smoothness is often key. Especially on low-powered 4-stroke rentals. Absolutely zero countersteering and smooth minimal inputs.
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Smoothness applies here too (and really in any form of karting).
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There’s a whole topic on hand position here: Getting to grips with hand position
Basically, I’ve always recommended that new drivers or drivers who struggling, to put your hands up at 10-2/11-1 to smooth out your driving. It eliminates your leverage on the wheel and forces you to make smaller inputs and therefore makes you a smoother driver. So if you are feeling more consistent with your hands up high, that’s probably why.