Hop: could someone explain what's happening

Mike,Thanks for your response.

So I experienced the severe hop in first couple laps on the tighter right handers. It was pretty easy to drive around, however. In the case of these karts, rather than sliding a bit on right turns if you overdid entry, hop.

The answer was to be less aggressive at turn in. I didn’t have to go slower, really, just less demanding of the kart at apex. Different line, sorta.

I didn’t record my first session so the one that hurt my lower back was NOT subsequently repeated.

Yep. It’s not a light and flexible chassis so asking a ton at turn in like our normal karts was a non starter. There was a limit and one could not pass it. But, laptimes were fine.