There’s two types of bikes in 8: standard and crotch rocket (for lack of a better term). They even have different icons when picking your kart. The drift mechanics are reversed on the crotch rockets. As far as I know this is intentional. Those feel backwards to me — if the standard karts feel backwards to you, I totally get it. It’s like being forced to use non/inverted camera controls, whichever is opposite to your preference.