The High Jump
At the starting line, start turbo and continue burning. Attack the first turn on the outside of the track, and continue accelerating with turbo. If done properly, you should be at 205 Km/h, which is just enough to get over the spire.
The Roller Coaster
The track is longer than most other tracks, since a normal lap length is 90 seconds rather than the usual minute.
When you start, just accelerate normally, and slow down after the first turn. Once the track starts going downhill, use turbo to quickly reach maximum speed.