to gain a speed boost round corners u can do one of 2 options
1) when u stay behind other players it creates less wind so u get a boost from being behind them
2) when on a bike pull a wheehly and you boost
I found a flaw in the game!!! In the star cup the maple tree level...u get stuck in the top of the tree when u bounce along the net. I was doing a trick on my bike and got stuck there!!!