How to Increase Speed Meter
Drive at top speed and make comebacks to increase the speed meter which controls the speed of your kart.
How to Increase Karma Meter
This keeps opponents from hitting you back. To increase it always use X after hitting a racer on your team to apologize.
Faster Driving Tip
Press The right analog stick up to crouch down and go faster.
After you land on 2 wheels add a spin or a flip for more points.
Increase Stunt Meter
Do stunts to increase the fun meter which will in turn allow even more stunts.