For this race it's faster to drive backwards and reset your car when
touching one of the checkpoints.
On the road in front of kwik-e-mart when going backwards you want to
stay on the right side so your reset position gets closer to the
starting line. Then reset your car after the gas station building or
when hearing the checkpoint trigger sound. Also try turning to the
right before reset your car so you'll get a better angle when you'll
respawn.
Full Mission Example
After this race go start 7-B.