Cheat Codes:

Enter "HEDGEHOG0" as a name, but do not press [Enter],
to enable cheat mode. If you entered the code correctly,
you will hear the sound of an engine rev. Press 
[Backspace] to return to the first letter of the name.
Then, enter one of the following names to get the 
results. To enter more codes, do not press [Enter] 
after the confirmation. Press [Backspace] to return to
the first letter and enter another code or any desired
name. 

The cheats may not be enabled in practice mode.

                        
RESULT  NAME
                           
Infinite gasoline = NOGAS                           
1956 KHK Bike = CLASSIC