Higher Speed/Acceleration:
At the initial copyright screen, press every single button at the same time on both controllers to make a combination of Up + Down + Left + Right + A + B + Select + Start in total. You can press the opposite D-Pad directions on the different pads. For example press Up + Right + A + B + Select + Start on the first controller and Down + Left on the second controller. A sound will confirm correct code entry. Instead of 192 mph, you'll be able to reach 201 mph and the faster acceleration. (If using just one NES controller, you must use a specially-modified one; normal ones don't allow pressing all D-Pad buttons at once.)
Name Password Easter Eggs:
Continue Game:
When you get Game Over, press and hold the A button, then press Start.
Max Speed (Japanese Version only):
During gameplay, hold Up during acceleration to max at 255 km/h.
Stage Select:
Once you select your vehicle, press the B button X-1 times (X = Track Number). Then, hold Up and Right and press Start.
View Game Ending:
Once you select your vehicle, press the B button 64 times. Then, hold Up and Right on the D-Pad and finally press Start.