There is another strategy that you can use to get an even lower time. It is 100% possible, but is really hard to achieve. First, accelerate your bike to break half of the ice blocks. Then, go back to the bottom of the circle and if your controls are perfect, you can land yourself on the TOP of the ice blocks, (without landing on top of the candy bridge) with no boost. Then, accelerate to the finish line.

(I will post on YouTube a walkthrough, but it takes a really long time to do that, so sorry about that).