All upgrades are free.
Take the Sportsbike challenge, race your sports bike through the city, desert, outback, mountains and salt lake.
Race against 8 other competitors on each stage.
Use your turbo to overtake and win the race. Upgrade your bikes engine, handling and turbo in order to progress.
Use AWSD or cursor keys to steer and accelerate/brake.
Fill your turbo meter by scraping your knees on the floor at full turn.
then press X or N to use the turbo.
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