To experiment with vertical shots Larry DeMar used his
Space Shuttle machine on its end and discovered that the maximum distance a ball could travel was about 8 inches and so all shots would have to be designed to be short ones. The concept and layout for this game were developed for ''Wreck'n Ball
or Wrecking Ball'' (the name wasn't finalized) in 1987 which was never completed and acted as a prototype for
Banzai Run. This was based on a (de)construction theme and had displays inset into the middle of the vertical playfield. The prototype was viewed by two Williams executives Ken Fedesna, and Neil Nicastro, with a leading pinball designer,
Steve Ritchie. Previously a software designer at Williams
Larry DeMar's experience and reputation persuaded them to manufacturer a version of the game. Other than the theme the biggest difference between this prototype and
Banzai Run is how the ball moves from the main playfield to the backbox playfield. The production version has the motor in the upper playfield and raises the ball using a screw assembly. During the design stages it was called "Banzai Enduro". The machine only used 2 balls in play during the multiball, but contained 3 balls. The software in the machine could compensate for a lost ball to reduce the time it could otherwise have been out of order. This was the first Williams pinball machine with this feature. This was also the first machine to use low voltage flipper buttons which could be used in attract mode without activating the flippers. The score display is in a higher than usual location, above the near vertical playfield. Due to the number of lights in the game certain ones on each the playfields cannot be activated when the corresponding light is lit on the other playfield. The motocross theme was suggested by Mark Sprenger. Most of the design team are on the playfield as names of the racers: • 6 Schimdt • 5 Sprenger • 4 Boon • 3 Lawlor • 2 Krutsch The game was more expensive to produce than a standard game, and released at a higher retail price. == Layout ==