Speed Kings
Boost start -
Hold Gas and Skid from where it shows the racers to when it says 1 in the count-down to do a boost-start. Your bike will thrust forwards when you let go of X but continue holding A.
Grand Prix mode -
To unlock GPM for single & mult you have to go to time attack and beat the best record.
All tracks -
To gain access to All tracks obtain gold medal on everything in License mode.
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