On the 3rd round, when they all get really good items, it is a strat called bagging. When you're in low places like 10, 11, 12, you get better items like the bullet bill, star, etc. Also, most of their yoshi combos focus on making mini turbos better. When you drift, you see the blue, orange, and purple sparks behind your tire they will give you a boost when you stop drifting. Also, the more coins you have, the faster you go. Just wanted to let you know!
Dan the reason why bikes aren't that popular is because of the two ways of drifting, inside drift that bikes have turn like that and ATVs like the ladybug cart with wings have outside drift that turn wider so inside drift is rarely used!