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And Bosch uses compressed air to keep motorcycles on track (experimental tech) https://www.youtube.com/watch?v=3ERowrZJyfw

If you could point them backwards for a little extra thrust ...

Modern supersports are pushing ~200hp, no need for the extra weight that would generate the thrust.

The Spitfire actually used the jet propulsion of the rearward facing exhaust for an extra few horsepower. Many piston engine aircraft do this.