Ah, so I just picked a great quirky first bike then? lolMuch inaccuracy of throttle control while cornering is due to necessary slack in the throttle cable and the loose fit of the throttle tube to the bar. Ride-by-wire solves half of this, but even then there is backlash in the trans - no way around that.
Put the bike on the centerstand and in say 3rd or 4th gear. Rotate the rear wheel back and forth. Has almost the same slop as a cush drive without the cush.