Unlimited off-road time:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 45712,173
Unlimited on road time:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 43810,173
Disable lap time:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 45385,173